New structure of gift in new version.
Support NextDay v4.5
Added method for sharing gift.
Fix block retain cycle warning.
Prettify log.
Added NextDaySharingChannelNone.
Several updates.

- Added geo info
- Added latest sharing info
- Refined methods for sharing and sending gift
Make lat and png NSNumber.
Support supportedgiftversions.
Shifted users.identify to version 2.
Fix bug: EnvState didn't change after server restarted.
Fix geo bug.
For NextDay v4.5