Notable updates:
- Added a separate Activity feed that can be "slid" to from the home page
- Added ability to create SoapBox posts; post with text up to 10000 characters!
- Added close button to all popup screens

Bug/Issue fixes:
- fixed issue where mention notifications wouldn't be sent if the text had an apostrophe in it
- fixed issue on the edit profile page where the text field would not be cleared after a successful submission
- fixed issues were text would be cutoff
- other minor fixes