Core and Basic modules are now much more like they should. Huge code clean:

Core and Basic modules are now much more like they should. Huge code clean:
- Merged Copy and Generic class into a new Fallback implementation: Translate.
  It searchs for a template and if it doesn't find it, it copy the output like
  Copy.
- Removed Title and Page (now are created by Translate fallback since they are
  too simple).
- Removed a lot of unused constructors.
- Cleaned up Link constructor (now it uses getURL()) and inherits directly
  from Container.

HIT Changes:
- Added searching for templates in include_path capabilities (much slower).
- Added optional group parameter to parse() method.
- Added exists() method to check if a template exists.
- Fixed paramters of getBuffer() and popBuffer().
- Renamed setGroup() as pushGroup() and unsetGroup() as popGroup().

Other updates:
- Updated ROADMAP.
- Updated UML diagrams.
- Updated example.
- Bugfixes.