Update .gitignore

Author: Amir Tocker

.gitignore

@@ -1,9 +1,9 @@
-## Android default ignore
+### Android template
 # Built application files
 *.apk
 *.ap_
 
-# Files for the Dalvik VM
+# Files for the ART/Dalvik VM
 *.dex
 
 # Java class files
@@ -12,11 +12,11 @@
 # Generated files
 bin/
 gen/
+out/
 
 # Gradle files
 .gradle/
 build/
-/*/build/
 
 # Local configuration file (sdk path, etc)
 local.properties
@@ -40,7 +40,6 @@ test-output/
 .idea/
 *.iml
 
-appengine-web.xml
 # Maven
 
 target/
@@ -54,4 +53,7 @@ buildNumber.properties
 .mvn/timing.properties
 
 # Avoid ignoring Maven wrapper jar file (.jar files are usually ignored)
-!/.mvn/wrapper/maven-wrapper.jar
+!/.mvn/wrapper/maven-wrapper.jar
+### AppEngine template
+# Google App Engine generated folder
+appengine-generated/