Add upcoming events status to artist object

Artist in SearchBox.parseArtistInfo now has access to JSON has_upcoming_events attribute. Will be used to s how touring status in band container.
Change artist tour attribute to tour_status
Add tourStatus node to bandPanelNode in BandPresenter.present

Previously created. Uncomment after adding tour_status to artist object in SearchBox.parseArtistInfo
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 empty send text controller for SMS
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 Twilio account id and auth token from ENV
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

:
Setup Twilio Client in environment
Add node content and class names to  FavoritesPresenter.present

Nodes -
-favoritesMenuNode
-bandContainerNode
-bandImageNode
-removeArtistNode
-saveNode
Add send_sms method to SendTextController with stubbed info
Append band nodes to bandContainerNode in FavoritesPresenter.present

Method returns bandContainerNode to view, which will draw favorites menu.
Menu will contain list of favorited bands. Each band has name, image, and remove button.
Menu will contain save button to notify users of their favorite artists' upcoming events.
Made user phone number attr_accessible for SMS
Add FavoritesView function to render favorites menu

- Takes band object as argument
- Band object passed to new instance of FavoritesPresenter.present
- FavoritesPresenter creates band content nodes which are appended to the new favorites menu container.
Remove Twilio Client from environment
Instantiate Twilio client in send text controller
Instantiate Twilio client using id and token from ENV
Merge pull request #31 from spring-peepers-2014/Twilio

Add Twilio functionality