Learn X v1.102.3

Whats new:
* register anonymous users
* using ACRA for automated bug reports and actvities
* made it possible to install on over 1000 more devices (changed sdk min to 14 and made wifi and gps non-obligatory)
* added edit of entries
* added create new entries
* added delete (flag as deleted) functionality both on list view and details view (for both phone and tablet situations)