renamed Core to core
#2: Updated gradle build dependencies, added some basic classes for
persistent objects

Task-Url: http://github.com/mgatz/sunrise/issues/issue/2
#2: Added preference object and repositoy with a small demo in
HomeController 

Task-Url: http://github.com/mgatz/sunrise/issues/issue/2
Merge pull request #12 from MGatz/basic_init

Final merge into master