fixed memory leak. Don't cache font file to save memory
updated to use new version of angle
more pthread support use std::thread and mutex
added ssize_t
revert to using DrawingSurfaceBackgroundGrid to fix Device memory leak. New angle version
fixed bad #ifdef
added purgeSharedSpriteFrameCache() to purge
add pch files
removed duplicate file
disabled wp8 fps debug display
updated projects to use precompiled angle and precompiled headers