Set up Parse

Added Parse to MainActivity, imported Parse jar.
Deleted test code from onCreate.
Added getters and setters to Pin.java and user.java.
Skeletal Implementation of DBQuery

Wrote a first version that isn't ready yet because we need to merge with
our new classes.
Merge remote-tracking branch 'origin/dbquery' into feature/parse-new
Updated DBQuery to use User class
Create ParsePin class for interacting with Parse.
Merge branch 'refs/heads/feature/parse-new-parse-user' into feature/parse-new
Update DBQuery to use ParsePin.
Changed method names and javadoc comments
Updated DBQuery's commenting and pin locking.

Improved comments, implemented a way to see if user has previously
viewed pin.
Wrote DBStore's postPin()

Wrote an initial version of postPin(). Also switched DBQuery to print
error messages to System.err instead of System.out.
Wrote DBStore's unlockPin()

Wrote an initial version of unlockPin() and cleaned up some comments.
Stubbed Testing Classes

Wrote empty versions of JUnit test classes for DBQuery and DBStore.
Wrote ideas for testing in the comments.
Alter model to use LatLng instead of Location
Merge remote-tracking branch 'origin/feature/parse-new' into develop

Conflicts:
	GeoPost/src/edu/washington/geopost/MainActivity.java