<DA-161> start take picture with xamarine.Media
<DA-161> save photo to local storage
<DA-161> Merge branch 'unstable' into DA-161
<DA-161> add methods for photo condition to controller
<DA-161> fix 349 again
<DA-161> change ios app storage to documents folder
<DA-161> start implement uploading files to server
remove drallo location in details’ map (Android)
remove drallo annotation and unused classes related to iOS map
Merge branch 'DA-357' into unstable

* DA-357:
  remove drallo annotation and unused classes related to iOS map
  remove drallo location in details’ map (Android)
just a comment
use ActionBar in image viewer
Merge branch 'DA-354' into unstable

* DA-354:
  use ActionBar in image viewer
fix missing Download Completed handler
Merge branch 'DA-363' into unstable

* DA-363:
  fix missing Download Completed handler
added new challengeEngine with final map-features
Merge branch 'new_challengeEngine' into DA-348

* new_challengeEngine:
  added new challengeEngine with final map-features
Fix some of compile errors
fix all compile time errors except two that are related to assembly versioning
change ImageProvider to interface; fix some typos