Update rails version.
Remove deprecated Digest::Digest call.
Structure after migrations.
Update mercury config saveURL from save_url to save-url.

New version of haml changes underscores in attributes to hyphens by
default.
Update ruby-prof, haml and braintree.
Update travis to use ruby 2.1.1
Fix rake execution error in travis mocha suite.
Merge branch 'master' into ruby-update

Conflicts:
	Gemfile.lock
Merge branch 'master' into ruby-update

Conflicts:
	db/structure.sql
Remove two specs that were broken (and not in use)

- Two specs were failing, probably due to changed error class in Ruby
  2.1.1
Update release notes
Update README Ruby versions
Merge pull request #358 from sharetribe/ruby-update

Update ruby to 2.1.1