Selenium tests

- Including Selenium test suites.  Paired with Graeme.
Logout Link, UI update

- Added a logout link to the main app page (the same link that can be
found on the splash screen).
- Cursor will now look like a hand when hovering over the table of
notes.
Wrote unit tests for Note.m class
- Refactored Note.m class from unit tests
Merge branch 'master' into master_viewnote
Updated README.md for info on how to run iOS app
Merge branch 'master' into CreateNote