Update README.md about lacking 64-bit support
Fixed #53. Assertions should be used to check the validity of the
software, not the assets it uses. It's valid for the game to mark a shader
stage as inactive when the game cannot find the texture map for the stage.
Fixed #266. The renderer was not unregistering the window class in
Windows.
Fixed #264. Using a logical AND will produce the same result as a bitwise
AND. The only different is the logical AND can take advantage of short
circuiting.
Merge remote-tracking branch 'upstream/master'