Update .gitignore

.gitignore

@@ -1,3 +1,33 @@
+# History files
+.Rhistory
+.Rapp.history
+# Session Data files
+.RData
+# Example code in package build process
+*-Ex.R
+# Output files from R CMD build
+/*.tar.gz
+# Output files from R CMD check
+/*.Rcheck/
+# RStudio files
+.Rproj.user/
+# produced vignettes
+vignettes/*.html
+vignettes/*.pdf
+# OAuth2 token, see https://github.com/hadley/httr/releases/tag/v0.3
+.httr-oauth
+# knitr and R markdown default cache directories
+/*_cache/
+/cache/
+# Temporary files created by R markdown
+*.utf8.md
+*.knit.md
+#Custom view
+.DS_Store
+Thumbs.db
+OBservData.Rproj
+#Embargo Folder
+Processing_files/Datasets_Processing/Embargo/
 .elton/
 add_travis_artifact_upload_keys.sh
-datasets/
+datasets/