Read .use files in a simpler way
Basic UseVersion parsing
Basic use version support
VersionAnd, VersionOr, work fine.
Support for not. A lil' bit.
Better not support
Parse parenthesis in version blocks correctly (hopefully)
Warning about ios
Lots more stuff versioned, android target
The old switcharoo. Separate versions and properties better.
Cache relevant properties
Hide some of the ugly stuff
Deprecate staticlib, compile rock from .use
Shut up about it.