FileHandler: Added support for wav
Audio: Added support to play back a sound with XAudio2. We can't delete sounds until we make our own system to keep track of available voices.
LoginScreen scene: Upped framerate from 15fps to tickless, and added new logic to clone the scrolling text at the bottom. All of it.
Added BMP (24-bit uncompressed, 8-bit uncompressed, and RLE8) and PNG support to File::ReadImageFile(). So far everything in FileHandler is presumed to be safe with any input file except UTK decompression.
Also started making use of the static keyword in various places to aid the compiler in optimization.
