1. Added repo select handler
2. Added branch select handler
3. Connected repo selection with default branch (which provides github)
4. Added title of selected drop-down menu item (Repository: <%= title %>)
5. Changed the way of re-fetch of tree and content
6. converted branch-list to array of objects (added group and isActive fields) before adding to the branches collection
7. Subscribed dynatree on collection reset (to prevent adding of a new items to existing one). Could be solved via dynatree widget re-write