minor refactorings to gateway code
moved provider specs to api folder
#4 added tests for Task:initWithDictionary
added a bunch of TimeHelper methods and tests
#4 using rake test in .travis.yml
#4 removed puts command from Rakefile
#4 default xcpretty formatting to 'test'
#4 tidied Rakefile
#4 added tests for TaskGateway
#4 fixed gateway initialization in AppDelegate.m
#4 fixed selector in gateway failure test
Merge pull request #12 from jbrunton/dev-4-gateway-tests

Merge dev-4-gateway-tests