Added basic creation of bounties without candidacies or personalities
Creating a new bounty now routes correctly to the root path on validated save
Bounties now sort descending by creation time. Seed file updated for new validations
Added isArtist property to User.
Small commit to show current work to contributor
Merge branch 'master' into bountyCreate
Merge branch 'master' into bountyCreate
Implement the ArtistDetail class for user information that only applies to artists.
Merge branch 'bountyCreate' of github.com:lionheartstudio/bountyboard into bountyCreate

Conflicts:
	app/views/bounties/new.html.erb
Give the new bounty view access to the list of existing artists so users can choose which artist may complete the bounty.
Correct an improperly defined relationship between the User and ArtistDetail models.
Correct some mistakes in models relating to the new ArtistDetail model.
Update the DB seed file to work with the new ArtistDetail model.
Streamline relations between User and Bounty, and make Candidacy.user_details not-null.
Comment
Make the database seed fail with an exception if any object cannot be saved to the database.
Modify the presence validation for ArtistDetail.approved so that false is a permissible value.
Add missing not-null validations on Bounty.private and Candidacy.is_acceptor.
Fix incorrect model relationships between Bounty and User and ArtistDetail.
Use FactoryGirl to build Bounty model tests.