Add automatic Login and logout menu option

- Refactor the LoginActivity to automatically log in if the phone number is in SharedPreferences.
- Move some code out into LoginUtils class.
- Add options menu on PeopleFragment for Logout. Logout logs the user out of Parse, clears the SharedPrefrences "phoneNumber" key, and starts the LoginActivity while killing the current activity.
Add new CustomReceiver to catch taps on Parse-generated system notifications
Merge branch 'refs/heads/develop' into paul-events
Take a stab at making the list of event look good
Tweak list design
Try another layout
Add date badge alternating sides.
Tweak colors
More color changes and text gravity changes
Create appropriate time string, revert some colors
Thinner badge, smaller fonts
Add slide animation between events list and event detail.
Change badge text to white, add DoubleTap listener
Begin event detail screen. Add scroller at the bottom for detail information
Lots of work on Event Detail screen. Formatting, animation.
Styled action bar.
Set base text color.
Fade in ScrollView once data is available to populate form.
Merge pull request #70 from thehelpsf/jing-develop

Set up basic styles and styled action bar and body text.
Add more animations to Event Detail screen.