licensing 6.x-1.0-alpha4

NEW FEATURES:
- by nickurbits: Make licenses brandable #647578: Make licenses brandable
- by nickurbits: license register page is now only accessible when logged in
- by nickurbits: License registration page can be disabled through admin interface
- by nickurbits: Make license generation hookable #654788: Make license generation hookable.

BUG FIXES:
- by nickurbits: if a new instance of license class is made without an argument, will not throw an error

TODO:
- Create new views field which contains themed hook_licensing_ops results
- Make all default reports views