Ported GPSSketchingSample to Storyboard

- Instead of delegates, now using model object to set or update
parameters
- Listening to changes in the parameters using KVO to reflect them
during an already running sketch
Updated screenshots
reverting to correct old images
Updated screenshots
Merge pull request #29 from Esri/gagan_GPSSketchingSample_storyboard

Gagan gps sketching sample storyboard