Merge pull request #39 from KatoStoelen/master

Minor changes to how accounts are added.
Merge pull request #42 from KatoStoelen/master

Use of dirty flag. Now DIRTY_FLAG has to be set when a record in a DB is changed in order for synch adapter to sync it to the service.
Merge remote-tracking branch 'ubicollab_dev/develop'
* New: Use of dirty flag. DIRTY_FLAG has to be set to 1 when a record in a DB is changed in order for synch adapter to sync it to the service. After a successful sync, DIRTY_FLAG is changed back to 0.

* New: Person has a new field USER_NAME.
Merge remote-tracking branch 'ubicollab_dev/develop'
Adapted to the new SDK version.
Merge pull request #47 from KatoStoelen/master

Adapted to version 0.4.0
Changed synchronization interval to every 15 seconds.
Invite all collaborators in one go.
Process sharings marked for deletion.
Removed intent filters on activities that are not to show up as an
application icon.
Merge pull request #50 from KatoStoelen/master

Minor changes to synchronizing.
Merge branch 'master' of github.com:UbiCollab/UbiShare