Rewrite v1.0 build 2

The patches to the problems found in previous build

• Rewritten audio backend to respect channel layouts (#1)
• Fixes for BWAV (latest version of OpenRevolution) (#3)
• Support for BCWAV, BFWAV (latest version of OpenRevolution) (#2)
• Respect file boundaries for perfectly smooth loop (#4)
• Respect the file loop flag
• App does not crash after non-looped file finished playing
• GUI tweaks (#5 and beyond)
• Icons for other formats
• App does not crash when opening multiple files sequentially from association