Alpha 2 release of 7.x-4.0

Major change is in the configuration page.
Minor fixes generaly.

- Fixed issue #1521240 by MJCO: Added Move from 'Fields' module group to 'Share/Sharing'.
- Issue #1303598 by matglas86: Structure of the configuration pages.
- Issue #1335510 by mgifford | benjarlett: Fixed Accessibility.
- Added constanst for 16x16 style.
- Coder style updates
- Updated api documentation.
- Added module_load_include for AddThisJson in AddThis initialization.
- Fixed issue #1489120 by matglas86, kenwest: Wrong widget url for https page.