update .gitignore and streamline precompile.R

Author: adamhsparks

.gitignore

@@ -2,10 +2,8 @@
 .Rhistory
 .RData
 .Ruserdata
-*.Rproj
+.Rproj
 inst/doc
-*.DS_Store
-
 .DS_Store
 *.code-workspace
 docs/

vignettes/precompile.R

@@ -1,7 +1,6 @@
 # vignettes that depend on internet access need to be precompiled and take a
 # while to run
-library("knitr")
-knit("vignettes/getCRUCLdata.Rmd.orig", "vignettes/getCRUCLdata.Rmd")
+knitr::knit("vignettes/getCRUCLdata.Rmd.orig", "vignettes/getCRUCLdata.Rmd")
 
 # remove file path such that vignettes will build with figures
 replace <- readLines("vignettes/getCRUCLdata.Rmd")
@@ -11,8 +10,7 @@ writeLines(replace, fileConn)
 close(fileConn)
 
 # build vignettes
-library("devtools")
-build_vignettes()
+devtools::build_vignettes()
 
 # move resource files to /doc
 resources <-