Resolves partly issue #43.

Stages are no more hardcoded. There is default json file,
which is parsed to the database. The database is updated
periodically (like other tables) from the server side.
Removed redundant StageType.
Oops.. almost saved wrong Stage values to db.
Removed wrong log message.
Fixed comments given to PR.
Change getOnly* methods to getOnlyLocation().get*()
Remove commented out code in FestAppMainActivity.java
New layout for main menu
Fixed StageDAO server queries to really work.
Added sampling for the map image. Sampling size is set with the SAMPLING_SIZE constant in MapActivity.java. This value has to be set on per image basis and cannot really be dynamically calculated.
Added assets, background image to main menu and begun with icons
Merge
Added assets and image for real this time
Merge branch 'main_menu_remake' of github.com:ljleppan/festapp-android into main_menu_remake
Merge branch 'master' of https://github.com/futurice/festapp-android into map_oom_fix
Modified files
Changed HttpBackendResponse from String to InputStream
Fixed some minor issues
Merge pull request #73 from robotti3/issue70

Fixed Issue 70
Refactored the way repeating service timer is created. This fixed the duplicating services issue.