first & lastDate 'enabled' range - (Thanks @Hout)

This first commit is the result of the merge of @Hout work.
PR submitted #6 & #12 where not mergeable as is.
Fix: Wrong lastDateMonth calculation.
Use UITabBarController in Demo Application
Expose Controller in Delegate Methods

Delegate Methods generate the warning on purpose, unfortunately the warning will not pop in the user implementation of the delegate.
Retrieve number of days per week from calendar
Add: Base for Unit Testing & Basic Tests
Update podspec to 0.6 & README
Merge pull request #14 from jivesoftware/develop

First/Last Date Range, Unit tests base, Improved Demo App
Fix: Display the overlay view in demo app

Set the edgesForExtendedLayout to UIRectEdgeNone
FIX - proper day number display for Chinese & Japanese notation
Fix: Handle multiple calendar in one app.

Don't set the locale but just the calendar, this fixes the "day label" in chinese or japanese calendar
Correct typo
Merge pull request #20 from karelia/master

Correct typo
Add endline to prevent warning.

Warning appears when GCC_WARN_ABOUT_MISSING_NEWLINE = YES.
Merge pull request #24 from tewha/build-clean

Add endline to prevent warning.
Remove deprecated Delegate methods. cf ReleaseNote
Remove PDTSimpleCalendarDaysPerWeek from codebase
Fix: Take contentInset into account in scrollToDate:

Reported in #22
Deprecate setSelectedDate:animated:

Selecting a date in the calendar shouldn't be tied to scrolling to it. (cf #22)
setSelectedDateAnimated: will be remove in upcoming version.

Use setSelectedDate: & scrollToSelectedDate: instead.
Update README & Release Notes