- adds Unset CSS extension, themers can now easily unset any core, contrib module or library CSS file from the UI or use info file declarations.
- improve many docblock comments and add new comments for developers
- improve hook_css_alter() implementation for the Unset CSS feature
Note this is quite likely to be the last alpha, the code is coming very stable now, unless we hit any snags this will be it, next round will be into a beta or even strait into an RC. Its getting very close.