Update .gitignore

Avoid tracking R studio config files

Author: tinatownes

.gitignore

@@ -11,3 +11,35 @@ __pycache__/
 /node_modules
 .mypy_cache
 /missing_db_signals.csv
+
+
+
+##Added by Tina to avoid tracking R studio config files
+# History files
+.Rhistory
+.Rapp.history
+
+# Session Data files
+.RData
+.RDataTmp
+
+# User-specific files
+.Ruserdata
+
+# RStudio files
+.Rproj.user/
+
+# OAuth2 token, see https://github.com/hadley/httr/releases/tag/v0.3
+.httr-oauth
+
+# knitr and R markdown default cache directories
+*_cache/
+/cache/
+
+# R Environment Variables
+.Renviron
+
+# RStudio Connect folder
+rsconnect/
+
+*.Rproj