Added gradle files for Android project

.gitignore

@@ -47,8 +47,6 @@ obj
 
 # Android Studio / Example project configs
 *.idea
-*.gradle
-local.properties
 
 #built application files
 *.apk
@@ -64,17 +62,7 @@ local.properties
 bin/
 gen/
 
-# Local configuration file (sdk path, etc)
-local.properties
-
-# Windows thumbnail db
-Thumbs.db
-
-# OSX files
-.DS_Store
-
 # Android Studio
-*.iml
 .idea
 #.idea/workspace.xml - remove # and delete .idea if it better suit your needs.
 .gradle