Use new term colour constant paths
Update xml generator!

Only stores the enums in a registry struct for now. The matching is a bit ugly - we need to clean it up.
Simplify registry builder by simply failing on a bad parse
Fix build for changes to std
Move libxml2 wrapper sax-rs repository
Add extra attributes to EnumNs
Parse command prototypes
Parse command parameters
Update to the latest sax-rs
Add alias field to Binding struct
Rename some fields
Implement command line args and type conversions
Implement type conversions for glx and wgl types
Move functions out of generator.rs
Fix group accumulation
Improve command line argument parsing
Add type aliases
Begin implementing loader generation functions
More generator work
Add is_loaded constants and fix some compile errors with the generated loader