Refactored database access code and added feed overview REST service

* Moved database access functions to dao folder
    * Separated Mongoose schema definitions into own file
    * Moved mapper code out of db.js
* Created mappers folder for storing classes for mapping database objects to JSON returned by web services
* Created REST endpoint for Feed Overview service
Added Feed Source REST service

* Added endpoint for feed source service
* Stubbed out mapSource function in feed mapper
    * Waiting on validation code to finalize
* Changed TOU to Terms of Service in feed-source partial to make it more readable by a
user
Added election REST service

* Added REST service for returning election information for a feed
* Stubbed out the mapper for election data until validator is done
package.json was missing a comma (,) after one of the lines
placeholder spinner.gif
starting to modify the UI rest calls to work with the server side rest callback order
Merge branch 'feed-services' of https://github.com/antinodes/VotingInfoApp into feed-services
Added additional services for returning feed details

* Added the following services:
    * election/contests
    * polling
    * history
    * contests
Merge branch 'feed-services' of github.com:antinodes/VotingInfoApp into feed-services
added .is-loading style
Merge branch 'feed-services' of https://github.com/antinodes/VotingInfoApp into feed-services
conecting the angular services to the server side rest end points. refactored the service calls to make calls based on retireving initial data needed to make additional rest calls. Made updates to the is-loading style also.
Added missing date from election service
connecting the feed election page with the server side rest calls. Also added ids for testing to the feed index, feed overview, feed source, and feed election page. UI also had logic to display a loading icon whilte data is being loaded.
Merge branch 'feed-services' of https://github.com/antinodes/VotingInfoApp into feed-services
changed markup for loading span
starting to add in feed overview functional tests
starting to add in feed overview functional tests
Merge branch 'feed-services' of https://github.com/antinodes/VotingInfoApp into feed-services
Adding in Feed Election page tests and adding in ids to appriopriate pages within the app to support testing.