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

Initial emitter remains the same however.
ParticleEmitter now resets the active particles too.
Add DepthShader
Add basic shadow mapping
Add shadow mapping to the tests
more docs for Sprite.java
- Avoid NPE if atlas property is not set and throw gdx exception with error message instead
- removed unnecessary object creation
- Avoid NPE if atlas property is not set and throw gdx exception with error message instead
- removed unnecessary object creation
Added icons and splash screens and changed app id and name for SuperJumper to make it ready for App Store.
Merge pull request #581 from ntherning/superjumper-app-store-ready

Added icons and splash screens and changed app id and name for SuperJumper to make it ready for App Store
Merge pull request #577 from hneuer/tmxloader

AtlasTmxMapLoader small fixes
Merge pull request #567 from xoppa/3dapi

3dapi: add basic shadow mapping
Merge pull request #564 from hneuer/pool

ParticleEmitter now resets the active particles too.
Merge pull request #135 from junkdog/master

ParticleEditor: delta multiplier and simpler new emitters.
Merge pull request #570 from jrenner/master

more docs for Sprite.java