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/Unity

@@ -2,8 +2,15 @@
 /[Tt]emp/
 /[Oo]bj/
 /[Bb]uild/
+/[Bb]uilds/
+/Assets/AssetStoreTools*
 
-# Autogenerated VS/MD solution and project files
+# Visual Studio 2015 cache directory
+/.vs/
+
+# Autogenerated VS/MD/Consulo solution and project files
+ExportedObj/
+.consulo/
 *.csproj
 *.unityproj
 *.sln
@@ -13,9 +20,15 @@
 *.userprefs
 *.pidb
 *.booproj
+*.svd
+*.pdb
 
 # Unity3D generated meta files
 *.pidb.meta
 
 # Unity3D Generated File On Crash Reports
 sysinfo.txt
+
+# Builds
+*.apk
+*.unitypackage