--COMMIT INFO--

CREATED:

- none

UPDATED:

- AddAlertFragment.java:
	- Changed import android.app.Fragment to import android.support.v4.app.Fragment in order to support the PagerSlidingTabStrip
- AlertsFragment.java:
	- Changed import android.app.Fragment to import android.support.v4.app.Fragment in order to support the PagerSlidingTabStrip
- LoginActivity.java:
	- Removed the check for preferences file and now use the sharedPrefsAreSet method from the preference class to check for saved user details
- MainActivity.java:
	- Removed the deprecated viewpager and now use the pager sliding tab strip from the following github project: https://github.com/astuetz/PagerSlidingTabStrip
	- Added an action bar menu with settings and sign out options
- MapsFragment.java:
	- Updated to extend SupportMapFragment instead of MapsFragment
- Preferences.java:
	- Added removeSharedPrefs method to be used when the user signs out of the application and remove their saved username and password
- activity_main.xml:
	- added the PagerSlidingTabStrip custom view above the view pager