Better scrollToToday behavior

Scroll month to top, including section header (month name). The
behavior is now similar to native calendar.
Merge branch 'develop' into LeoNatan-master

Conflicts:
	RSDayFlow/RSDFDatePickerView.m
[Update] Names of some methods.
[Fix] Frame for header for section.
[Fix] Section in the method "scrollToDate:animated:".
[Update] Scrolling for the landscape interface orientation.
[Add] Visual feedback of the currently selected cell.

Resolves #25, close #31.
Version bump (0.7.0)
Merge pull request #34 from ruslanskorb/develop

Version bump (0.7.0)