Adding the full mix files for the gameplay music.
- Switch to the non-layered music for the main game
- Don't load a bunch of sounds that we're not using anyway
- remove redundant initialVolume parameters.
Merge pull request #215 from virtual-world-framework/game-music-full-mix

Game music full mix
Added gridObstacle component
Added rotation logic
Added obstacle components
Added new rubble crater obstacles.
Made crash pod a gridObstacle
Add editor application
Start adding grid tiles to editor
Start working on user interface for editor
Improve interface and hard code lists
Added hover effect on list items
Fixed grid world calculations
Differentiated between maps and other assets
Fixed indentation
Added tool background image
Improved drag functionality
Added transform tool buttons