Add contributors

Added @higgi13425  as a contributor for his much needed documentation editing!
diff --git a/.Rproj.user/shared/notebooks/paths b/.Rproj.user/shared/notebooks/paths
index 864b81d..14c47e8 100644
--- a/.Rproj.user/shared/notebooks/paths
+++ b/.Rproj.user/shared/notebooks/paths
@@ -1,2 +1,3 @@
+/home/thornux/Documents/GitHub/posterdown/DESCRIPTION="7CC65C58"
 /home/thornux/Documents/GitHub/posterdown/inst/rmarkdown/templates/posterdown_pdf/skeleton/skeleton.Rmd="E9E00AA3"
 /home/thornux/Documents/mytestmem.tex="5C02E06A"