-Support for changing fonts

-Detect when free() might crash the project and throw error
-fixed 2D Bounce in physics (3d still broken)
-renamed “on_top” property to “behind_parent”, which makes more sense, old on_top remains there for compatibility but is invisible.
-large amount of fixes

platform/android/java/ant.properties

@@ -15,8 +15,3 @@
 #  'key.alias' for the name of the key to use.
 # The password will be asked during the build when you use the 'release' target.
 
-key.store=/home/luis/Downloads/carnavalguachin.keystore
-key.alias=momoselacome
-
-key.store.password=12345678
-key.alias.password=12345678