Added stub for Rifle Fire Sound
Converted some imported props into models.

Increased the awesomeness
Added
Improved the rifle muzzle to include scale variation
Merge remote-tracking branch 'origin/master' into alex
Random rotation, scale and materials on muzzle flash
Added Alex dev project to main menu

Also allow you to press esc to go back to main menu
Fixed lightmaps in test scene
Merge remote-tracking branch 'origin/master' into alex