Various changes: range in month, changed delegate definition, changed format for other locales, updated readme

- included initCoder so the controller can be used in story boards
- adapted delegate to include viewcontroller; thus one can distinguish between various occurrences of the vc
- Formatting of days in locale character set. See example in Arabic signs.
- Allow valid date range to start and finish in the middle of a month, disabling all dates outside that range.
- included disabled format in UIAppearance
- Updated demo to illustrate use of the above (other character sets must be set on the device)
- Delegate is not called when changing selected date programmatically, only when selecting it from the screen.