Many bug fixes and improvements, including:
- BLEND_RGBA_* blitters and blenders to go with the BLEND_RGB_* blend modes.
- documentation updates (mainly for new sprite classes released in 1.8.0)
- sound fixes, and streaming some music from file like objects
- image saving fixes
- greatly expanded tests
- Pixelarray, and surfarray updates and fixes.
- Enhanced Color class, reimplemented in C for speed.
- New Windows and Mac binary installers.
Many thanks to Marcus, Lenard, Brian, Nicholas, Charlie Nolan, Nirav Patel, Forrest Voight, Charlie Nolan, Frankie Robertson, John Krukoff, Lorenz Quack, Nick Irvine, Zhang Fan and everyone else who helped out with this release.