Many changes almost related with effects and the re-factor of plugins:

Many changes almost related with effects and the re-factor of plugins:
- Removed plugin stuff which already were moved to the plugins module
- Moved all GQuery core plugin stuff into the plugins namespace
- Redesign and recode of the Effects plugin using GWT animate as base
- Documented many undocumented methods
- Added a couple of scripts to generate Lazy interfaces from the class
- Modifications to the effects sample to show the usage of the effects plugin
- More tests cases in the devtest module.
- Many other minor changes.