Synced gitignores with github repo (#1245)

* Renamed scripts directory into contrib

* Added script to download gitignores from github

* Synced gitignores with github repo

options/gitignore/Vim

@@ -1,6 +1,12 @@
-[._]*.s[a-w][a-z]
-[._]s[a-w][a-z]
-*.un~
+# swap
+[._]*.s[a-v][a-z]
+[._]*.sw[a-p]
+[._]s[a-v][a-z]
+[._]sw[a-p]
+# session
 Session.vim
+# temporary
 .netrwhist
 *~
+# auto-generated tag files
+tags