Delta multiplier added to Editor Properties.
New emitters are configured as bare-boned skeletons.

Initial emitter remains the same however.
Add ScreenAdapter.java for GWT
Create ScreenAdapter.java
Bullet: various changes
Swig generated files
Update tests
Remove test code
Remote more test code
[ShaderProgram] : Removed useless statements in #getAttributeXXX(String)
[ShaderProgram] : Removed useless statements in #getUniformXXX(String)
Added ParticleLoader.
added JsonValue#hasChild()
docs improved
Default serializer, customizes unrecognized objects instead of always getting JsonValue.
Merge branch 'origin/master'
Avoid some field accesses.
Made JsonValue iterable.
Rewrote EarClippingTriangulator, doesn't allocate.
More optimizations.