Preference pane with graceful degradation

[apla]

If platform supports native preference pane, show it. Otherwise, display HTML form

For Android and iOS return to app from preference pane generates cordova resume event. This is unsupported for HTML form. Need to think about uniform API or event for preferences change. probably #37

• Android preference activity
  • [x] generation
  • [x] show programatically
• iOS preference pane
  • [x] generation
  • [x] switch programatically
• Windows Store Desktop preference pane
  • [ ] generation
  • [ ] show programatically
• HTML form fallback
  • [ ] generation
  • [ ] show programatically

[SomaticIT]

:+1: Using #50 we can create independent modules for each platforms and build process is automated using hooks so we can generate HTML form for Windows Store and other platforms apps.