Revision D7 (WorldInstance | World | Rendering )

Semantic Changes:
- Renamed variables and methods to use mixed case notation.

Added Classes:
- Camera
- Entity Base
- Entity Player

Class Changes:
- Corrected spelling error for EntityVisible. (No longer EntityVisable)
- World is being prepped to hold WorldInstances
- WorldSlice properly layers slices
- WorldInstance propely layers slices

Deprecated Classes:
- Saveable
- ClassSave
- misc save related test classes
- Now use Java serialization.

Todo:
- Fix WorldSlice draw rendering algorithm.
- Properly instance WorldInstances for infinite left/right/up/down
movement
- Serialize all save data and reload successfully.
- Create and use Player class
- Implement simple physics
- Implement simple GUI
- Implement simple sound