Add getUserCountry and general API query function matomoQuery

Change-Id: Iedea1fcacf7329144e71f1412fc41238efc30bb2
diff --git a/man/matomoQuery.Rd b/man/matomoQuery.Rd
new file mode 100644
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+++ b/man/matomoQuery.Rd
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+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/matomoquery.R
+\name{matomoQuery}
+\alias{matomoQuery}
+\title{Get reports from a matomo API server}
+\usage{
+matomoQuery(
+  matomoUrl,
+  siteId,
+  period = "month",
+  date = "last16",
+  filter_limit = 100,
+  removeFirst = FALSE,
+  removeLast = FALSE,
+  accessToken = getAccessToken(matomoUrl),
+  getMethod = "VisitsSummary.get"
+)
+}
+\arguments{
+\item{matomoUrl}{base URL of your matomo instance}
+
+\item{siteId}{matomo site id or vector of site ids}
+
+\item{period}{\code{day}, \code{week}, \code{month} or \code{year}}
+
+\item{date}{date range (see \url{https://developer.matomo.org/api-reference/reporting-api})}
+
+\item{filter_limit}{defines the maximum number of rows to be returned}
+
+\item{removeFirst}{logical that determines whether the first row of each site should be removed (to account for incomplete periods)}
+
+\item{removeLast}{logical that determines whether the last row of each site should be removed (to account for incomplete periods)}
+
+\item{accessToken}{API Authentication Token - you can get this in your
+matomo interface under Settings -> Personal -> Settings -> API Authentication Token
+and pass it here, or you can make it persistent with \code{\link{persistAccessToken}}.}
+
+\item{getMethod}{API method to call – default: VisitsSummary.get}
+}
+\value{
+Data frame with visits summary as returned by matomo. Note that the \code{date} column in the returned data frame refers to the first day of the respective period.
+}
+\description{
+See matomo Reporting API Reference (\url{https://developer.matomo.org/api-reference/reporting-api}) for details.
+}
+\examples{
+\dontrun{
+df <- matomoQuery("https://demo.matomo.org/", getMethod = "UserCountry.getCountry")
+}
+
+}
+\references{
+\url{https://developer.matomo.org/api-reference/reporting-api}
+}