(dummy) playback control view in timeline
observable state for player service
handle new intents correctly (in drallo details activity)
store serialised challenge in service to allow navigating to drallo details from notification
basic player control
Show error messages from MediaPlayerService
Show error messages from MediaPlayerService (fix)
Show playing time
Show playing time (fix format)
Show playing time (fix format) [2]
fix (progress not repotted after pause/resume)
cleanup xml layout
use seekbar
respond to seekbar dragging
fully working seekbar
Merge branch 'DA-324' into unstable

* DA-324:
  fully working seekbar
  respond to seekbar dragging
  use seekbar
  cleanup xml layout
  fix (progress not repotted after pause/resume)
  Show playing time (fix format) [2]
  Show playing time (fix format)
  Show playing time
  Show error messages from MediaPlayerService (fix)
  Show error messages from MediaPlayerService
  basic player control
  store serialised challenge in service to allow navigating to drallo details from notification
  handle new intents correctly (in drallo details activity)
  observable state for player service
  (dummy) playback control view in timeline