rubyfb-0.5.3
This release brings some incompatibility with FireRuby - the top module is now renamed to Rubyfb, thus breaking any code that explicitly uses FireRuby module name.

Apart from the top module rename:
- Improved Windwos support - the source gem should now compile on Windows
- :sql_role_name support in RubyfbAdapter connection options
- new helper methods/objects to bring stored procedures executing support to the surface.