Fixes/Changes:

- Modern Objective-C'ified  (like removing @synthesize)
- longPress gesture is ON by default
- fixed: stickerViewDidClose: delegate method now gets called correctly ("delete")
- renamed 'delegate' to 'stickerViewDelegate', so it's more readable and better defined
- also made 'stickerViewDelegate' a 'weak' property
- added -(BOOL)isEditingHandlesHidden;
- Added functionality that when 'isEditingHandlesHidden == YES' then it also prevents the user from moving the view
- Updated the DEMO app to reflect some of these changes.
- Uncrustified the code.  (just my own personal style)