Fixes#363
- Added new grunt task to run casperjs tests.
- Added prerequisites (sass/bourbon/casperjs) to travis config.
- Updated failing functional tests to use more robust `waitFor`
statements.
- Updated capserjs `base.js` file to use a password which conforms to
our 8 character minimum.
- Added necessary logout to first test and also registration step to
ensure a user is present in the system.