Update installation.Rmd

vignettes/installation.Rmd

@@ -1,6 +1,6 @@
 ---
 title: "Serocalculator package installation manual"
-author: "European Centre for Disease Prevention and Control (ECDC)"
+author: "UC Davis Seroepidemiology Research Group (SERG)"
 date: "`r Sys.Date()`"
 output: 
   rmarkdown::html_vignette:
@@ -23,7 +23,7 @@ pkgVersion <- packageDescription(pkgName)$Version
 pkgDate <- packageDescription(pkgName)$Date
 pkgBaseFileName <- paste(pkgName, pkgVersion, sep = "_")
 pkgUrl <- gsub("\n", "", packageDescription(pkgName)$URL)
-pkgPath <- "http://ecdc.europa.eu/en/data-tools/seroincidence-calculator-tool/Documents"
+pkgPath <- "https://ucd-serg.github.io/serocalculator/"
 library("knitr")
 ```
 
@@ -34,7 +34,7 @@ library("knitr")
 Package **`r pkgName`** is written in programming language R and end user must have access to a 
 working installation of R engine. This document describes the most common setup with R installed 
 locally on the user's computer. The screenshots refer to the classical R interface, but the package 
-can also be opened in other Graphical User Interfaces fo R like e.g. 
+can also be opened in other Graphical User Interfaces for R like e.g. 
 [RStudio](http://www.rstudio.com/products/RStudio/).
 
 # 2. Installation steps