Refactoring, removed less, merged config groups
Rewrite of Mage_Core_Model_Design_Package
Added versioned directory
Update YUI class
Update copyright
Merge branch 'refactor'

* refactor:
  Update copyright
  Update YUI class
  Added versioned directory
  Rewrite of Mage_Core_Model_Design_Package
  Refactoring, removed less, merged config groups