Add fade in/out to intro screens
Store only image sources in intro object instead of images
Rework fade in/out to use transistion screen
Merge pull request #85 from virtual-world-framework/screen-fade

Screen fade
Fix intro screen onload bug
Merge pull request #86 from virtual-world-framework/screen-fade

Fix intro screen onload bug
Make the sound driver work, plus some cosmetic changes.

Conflicts:
	index.vwf.config.yaml
Added in a sound we can test with.
This commit will add the menu/gameplay music file

20140602
Delete TrueGameAudioMusicMenu_20140530.03.wav
Delete TrueGameAudioMusicStandardGameplayFullMix_20140530.01.wav
Add SFX

rover motor variants
wind
rover gravel crunch
This commit will add Menu Music

Intro and main loop.
Music.
Merge pull request #77 from virtual-world-framework/branch/sound

Branch/sound
Refactored scenario

Conflicts:
	source/hudInstructions.js
Set and reset scenario
Fixed property reference