Implemented these functionalities :
- adopted and tested screen layout on various devices. Created 3 different dimension sets for: default scenario, larger-than 1080dp and xxhdpi density screens.
- added ability to view original-sized photo. photo can be zoomed by crossing and double tapping. if original-sized photo is too large to display up to 1024px size photo is downloaded
- added a stylized actionabar to make searches based on tags
 - added internet connection handling on all activities. If no internet is present, user is redirected to informational screen.  Connectivity status is handled at runtime via BroadcastReceiver
More information about implemented functionalities on readme.txt