Add controller action to create match
Change icons on matches#new page
Update match specs with new date validations
Ask user to login before create a Match
Render error message when saving an invalid match
Invert unless statement with else
Change icons in Match page
Remove match button from fixed status bar

It's a bad idea to keep it in this way since we don't have enough space
to button names.
Improve appearence of match page
Add acceptance spec for match creation
Remove unused MatchesDecorator
Use emCalc function in SASS files related to Matches
Localize names in Matches#new view
Group belongs_to specs in a associations describe
Prefer single quotes over quotes when using string literal
Move Match model out of Projects::Challenges namespace

Following discussions in https://github.com/neighborly/neighborly/pull/220 .