removed save_and_open_page
added test to validate unique username
added test for user model authenticate method
added test for user model authenticate method exists
Merge pull request #21 from otters-2014/tests

Tests
added test for User#update
User Controller tests for updated added
took out self.authenticate and the tests because not needed
changed Travis so it will only run for ruby 2.0
Merge pull request #22 from otters-2014/tests

Tests
test_run
pulled from master
merged from master
adjusted tests to reflect different route behavior
removed defunct users#new
tests to cover branching in tweets#new and tweets#create
change branching behavior in stories#create; fail at testing