Store location.time in seconds, not milliseconds

Resolves #7
New seed database, with changes to favorite table

 - Declare id column as INTEGER PRIMARY KEY, resolves #6
 - Add last_location column to track algorithm's progress, resolves #8
 - Also, check in the script used to create these tables
SQL script to migrate data (& add sample favorite)
Script to load KML tracks into database
Prototype one algorithm idea
Another algorithm that (mostly) avoids overlapping

Definitely better, but still leaves multiple nearby favorites sometimes
Avoid problems with weight calculation
Initial implementation of DatabaseResetter
Some initial work on FavoriteAdapter.updateFavorites
Implement algorithm in FavoriteAdapter
Merge branch 'favorites-list' into algorithm

Conflicts:
	src/se/kth/ict/hotspots/db/FavoriteAdapter.java
Synchronize updateFavorites on the database

This primarily avoids new favorites interfering with
backlog processing.
Call updateFavorites from DatabaseResetter
Rename favorite in database on long press
Prompt for new favorite name
Select and focus text field in dialog
Merge pull request #5 from coyotebush/favorites-list

Favorites UI
Merge pull request #16 from coyotebush/edit-favorite-name

Editable favorite names
Merge pull request #9 from coyotebush/db-cleanup

Miscellaneous database format cleanup
Merge branch 'master' into algorithm

Conflicts:
	src/se/kth/ict/hotspots/db/FavoriteAdapter.java