Add favorites_presenter.js

FavoritesPresenter will parse band object created in BandPresenter and create nodes to be used in the favorites dropdown view.

User selects band in search, clicks add band. Band is then added to the favorites list. Once added the user can set reminder for upcoming events.

Methods:
- present
Add nodes to be appended to favorites menu div by FavoritesPresenter

Nodes:
- favoritesMenuNode
- bandNode
- saveNode
Add additional nodes to append to favoritesMenuNode in FavoritesPresenter

Nodes
- artistNameNode - additional div within bandNode
- RemoveArtistNode - remove band from favorites list
Add small image from band JSON objeect to artist object

- Rename previous image attribute to image_url_large
- Add image_url_small
- Small image will be used in favorites menu
Add additional nodes to FavoritesPresenter

- bandImageNode will display small image of band in bandContainerNode
- set bandImageNode to img variable containing img create element

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