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
ParticleEmitter now resets the active particles too.
Added bounding box for particle effects.
Edited CHANGES file.
Add DepthShader
Add basic shadow mapping
Add shadow mapping to the tests
more docs for Sprite.java
Update PolygonSpriteBatch.java

Docs wtf
Merge pull request #572 from jrenner/patch-1

Update PolygonSpriteBatch.java
Javadocs.
Merge branch 'origin/master'

Conflicts:
	gdx/src/com/badlogic/gdx/graphics/g2d/PolygonSpriteBatch.java
git sucks
Javadocs.
Javadocs, organization/cleanup.
Moar javadocs.
Comments.