Update to v0.1.2 with HTML support

moved posterdown_pdf to posterdown_latex, added posterdown_html, added to ReadME, added ciation file. added @shedimus  as contributor in Description file.
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+---
+# PLEASE SEE THE README for in depth description github.com/brentthorne/posterdown
+#
+#---POSTER SIZE & DEFAULT FONT---#
+poster_height: "38in" # height in inches of poster
+poster_width: "45in" # width in inches of poster
+font_family: "palatino" # choose from typical latex fonts (example: "palatino")
+font_size: "30pt" #please see github.com/brentthorne/posterdown for compatible options.
+
+#---TITLE BOX OPTIONS---#
+#ESSENTIALS
+title: '\fontfamily{phv}\selectfont Using posterdown to generate reproducible conference posters via RMarkdown > Knitr > Markdown > Pandoc > Latex > PDF workflow'
+author: "Author One^1^ Author Two^2^"
+affiliation: "^1^Department of Poster Layouts, University of Markdown; ^2^Deparment of Another Institution, Institution University"
+#STYLE & FORMATTING
+titlebox_bgcol: "008080"  #Colour of the Title Box background
+titlebox_bordercol: "0b4545" #Colour of the title Box border.
+titlebox_shape: "all"
+titlebox_borderwidth: "1cm"
+title_textcol: "ffffff" #colour of title text
+author_textcol: "0b4545" # Colour of author text
+affiliation_textcol: "FFFFFF" # Colour of affiliation text
+title_textsize: "Huge"         # Poster title fontsize
+author_textsize: "Large"       # Author list font size
+affiliation_textsize: "large"  # Affiliation font size
+#ADDING LOGOS
+logoleft_name: 'Figures/posterdownlogo'
+logoleft_width: '3in'
+logoleft_xshift: '1in'
+logoleft_yshift: '1in'
+logoright_name: 'Figures/posterdownlogo'
+logoright_width: '3in'
+logoright_xshift: '-1in'
+logoright_yshift: '1in'
+
+#---POSTER BODY OPTIONS---#
+body_bgcol: "ffffff" #colour of the poster main background
+body_textsize: "normalsize"    # Size of the main poster body text
+body_textcol: "000000" # Colour of main text in the body of poster
+column_numbers: 4 # Number of columns that the poster has
+column_margins: "0.5in" # Margin spacing for columns
+columnline_col: "008080" #colour 
+columnline_width: "0pt" #width of line between each column
+#SECTION TITLE STYLING
+sectitle_textcol: "ffffff" # Colour of the poster section titles
+sectitle_bgcol: "0b4545" # Colour of the section title box
+sectitle_bordercol: "0b4545" # Colour of the border around the section title box.
+sectitle_borderwidth: "2mm" # Thicknes of the section title box border
+sectitle_boxshape: "uphill" # Changes the shape of the section title box.
+
+#---BIBLIOGRAPHY OPTIONS---#
+bibliography: MyLibrary # name of the .bib file used for referencing
+bibliography_spacing: 0.8 # sets the multiplier for line spacing of bibliography spacing (between 0 and 1)
+bibliography_textsize: "small"  # size of the bibliography text size (handy for one too many references!)
+
+#---OTHER---#
+cite_col: "CC0000" #colour of ciation elements
+url_col: "008080" #colour of url links
+link_col: "008080" #colour of other links within the poster
+footnote_textcol: "ffffff" # Colour of footnote text if used
+output: posterdown::posterdown_latex
+---
+
+```{r, include=FALSE}
+knitr::opts_chunk$set(echo = FALSE, results = 'asis',fig.height = 3.5, fig.width = 4.5, out.width = "100%", warning = FALSE, fig.align = 'center', message = FALSE, dev='cairo_pdf')
+```
+
+<!--
+Bellow you will find typical RMarkdown syntax which should fill in the columns for the poster from top to bottom left to right. The more information you have the more will be filled. Please let me know if you have feedback at brentthorne18@gmail.com or at github.com/brentthorne/posterdown.
+ENJOY! XD
+-->
+
+# Introduction
+
+Welcome to `posterdown` ! This is my attempt to provide a semi-smooth workflow for those who wish to take their `RMarkdown` skills to the conference world. Many creature comforts from `RMarkdown` are available in this package such as `Markdown` section notation, figure captioning, and even citations like this one [@holden_identifying_2012] The rest of this example poster will show how you can insert typical conference poster features into your own document. 
+
+# Study Site
+
+Here is a map made to show the study site using `ggplot2`, `ggspatial`, and `sf` and you can even reference this with a hyperlink, this will take you to **Figure \ref{mymapfig}**. Lorem ipsum dolor sit amet, [@middleton_geological_nodate] consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. 
+\vspace{1cm}
+
+```{r, out.width="80%", fig.cap='This is a map of Canada, the ggspatial package is great for GIS folks in R! \\label{mymapfig}', cache=TRUE}
+library(ggplot2)
+library(ggspatial)
+library(tidyverse)
+library(ggthemes)
+library(sf)
+
+canada <- read_sf("data/Canada.geojson")
+
+yukon <- canada %>% 
+  filter(PROV == "YT")
+
+ggplot() +
+  ggspatial::layer_spatial(canada,fill = "grey80", colour = "grey60") +
+  ggspatial::layer_spatial(yukon,fill = "yellow", colour = "black") +
+  ggspatial::annotation_north_arrow(location = "br",pad_y = unit(1,"cm"),pad_x = unit(0.7,"cm"), which_north = "true", style = north_arrow_orienteering()) +
+  ggspatial::annotation_scale(location = "br",style = "ticks") +
+  coord_sf() +
+  theme_pander() +
+  theme(legend.position = "none") +
+  NULL
+```
+
+# Objectives
+
+1. Easy to use reproducible poster design. 
+2. Integration with `RMarkdown`.
+3. Easy transition from `posterdown` to `thesisdown` or `rticles`
+
+\lipsum[2]
+\lipsum[4]
+
+# Methods
+
+This package uses the same workflow approach as the `RMarkdown` you know and love. Basically it goes from RMarkdown > Knitr > Markdown > Pandoc > Latex > PDF.
+
+# Results
+
+Usually you want to have a nice table displaying some important results that you have calcualated. In posterdown this is as easy as using the `kable` table formatting you are probably use to as per typical `RMarkdown` formatting. I suggesting checking out the `kableExtra` package and its in depth documentation on customizing these tables found [here](https://haozhu233.github.io/kableExtra/awesome_table_in_pdf.pdf).
+
+\vspace{1cm}
+
+```{r}
+library(kableExtra)
+library(ggplot2)
+
+data("iris")
+
+kable(iris[1:4,],align = "c", caption = "Tables are a breeze with Kable and Kable extra package!", booktabs = TRUE) %>% 
+  kable_styling(latex_options = c("striped","HOLD_position"),full_width = TRUE, font_size = 25)
+
+```
+
+\vspace{2cm}
+
+```{r, out.width='100%', fig.height=4.5, fig.cap='Using ggplot and patchwork to generate a layout of multiple plots in one figure. The iris dataset was used to generate (a) a line graph, (b) a scatterplot, and (c) a boxplot all together!'}
+
+library(tidyverse)
+library(patchwork)
+library(ggthemes)
+
+theme_set(theme_gray() + theme_tufte() + theme(legend.position = "none"))
+
+base <- ggplot(iris, aes(x = Sepal.Length, y = Sepal.Width, colour = Species))
+  
+p_point <- base + geom_point()
+p_line  <- base + geom_line() 
+p_area  <- base + geom_area()
+p_box1  <- ggplot(iris) + geom_boxplot(aes(x = Species, y = Sepal.Length, fill = Species))
+p_box2  <- ggplot(iris) + geom_boxplot(aes(x = Species, y = Sepal.Width, fill = Species))
+
+p_line + 
+  {p_point + p_box1} +
+  plot_layout(ncol = 1) + plot_annotation(tag_levels = "a", tag_prefix = "(",tag_suffix = ")")
+
+```
+
+
+```{r, out.width='85%', fig.width=4.5, fig.height=4, fig.cap='Another typical plot using ggplot, this time with a different theme and r code chunk options for fig.width and fig.height.'}
+
+library(ggplot2)
+library(ggthemes)
+
+ggplot(data = iris, aes(x = Sepal.Length, y = Sepal.Width, colour = Species)) +
+  geom_point() +
+  theme_tufte() +
+  labs(x = "Sepal Length", y = "Sepeal Width") +
+  NULL
+
+```
+
+
+```{r, out.width='80%', fig.width=4.5, fig.align='center', echo=TRUE, fig.height=5, fig.cap='Another figure showing how base R plots might look on this poster!'}
+
+# Here is some code for people
+# to look at and be in awe of!!!!
+library(ggplot2)
+library(ggthemes)
+
+ggplot(data=iris,
+       aes(x = Sepal.Width,
+           y = Sepal.Length,
+           colour = Species)) +
+  geom_point() +
+  theme_tufte() +
+  NULL
+
+```
+
+\lipsum[1-2]
+
+# Next Steps
+
+There is still **A LOT** of work to do on this package which include (but are note limited to): 
+
+- Better softcoding for front end user options in YAML
+- Images in the title section for logo placement which is a common attribut to posters as far as I have come to know.
+- Figure out compatiability with `natbib` which wasn't working during the initial set up.
+- MUCH BETTER PACKAGE DOCUMENTATION. For example, there is nothing in the README...
+- Include References section only if initiated by the user like in RMarkdown.
+
+<!--- Here you can set the size of the citation text as well as remove the "References" section if you choose not to have one for some reason :) -->
+\small\printbibliography