Redraw calendar only when the new interface orientation is different …

…from the old one.

Selection improvements, code cleanup.

Fix a bug with previously selected cell staying highlighted.

Add vertical separators, add landscape support for iPhone.

Pass weak reference to animation blocks, highlight subviews on select…

…ion/highlight, add -dateForIndex: method.

Upadate podspec version.

Add podspec, make width of previous and next month buttons minimum 44px.

Update description, add screenshots, add separatorEdgeInsets and dayC…

…ellEdgeInsets properties to Calendar view.