Add conditional to signup link listener

- If user is already signed in, the link will not exist
Refactor FavoritesView initialization

- Add defineView method in FavoritesView
- FavoritesView now accepts domElements argument
Refactor SearchView

- Add defineView to SearchController
- defineView initializes BandView and SearchView
- addSearch view dom elements to dom elements object
Refactor BandView

- Remove hardcoded css classes
- Add Shogogo namespacing
- Initialize BandView in controller defineView methods
Merge pull request #210 from spring-peepers-2014/technical-debt-begone

Refactor search and band js views