Added NetworkCommand interface
Added package-info files; Updated Sprite javadoc
Added drawTexture overload for TextureRegion

- Also added scale, width, height and rotation to the sprite batch
submission
Added doxygen settings
Removed paths that were hard-coded to my PC

In doxygen settings
Increased Graphics system test coverage
Merge pull request #51 from BU-CS673/Canfield

Canfield -> Graphics