add tests for challenge model
edit readme
add challenge validation tests
change challenge amount from string to integer on challenges
change money gem to money-rails gem
add inclusion validation for challenge status field
add message model validations and tests
removed validation that end date is greater than start date, can't make it work at the moment
add user_challenge tests
add about and contact routes
update readme
Merge branch 'sites_controller'
added users, challenges, messages controllers and routes
Merge pull request #6 from marklc44/master

add tests for challenge model