Added workaround for a bug in UIDatePicker in count down mode.

This fixes skywinder/ActionSheetPicker-3.0#104
Merge branch 'master' of https://github.com/tomaskraina/ActionSheetPicker-3.0 into tomaskraina-master
add countDown picker example
Modified a test case that shows bug in UIDatePicket
add delay to test
Merge branch 'develop' into tomaskraina-master
fix
add addtitional check for value
Updated workaround for bug in UIDatePicker
This fixes skywinder/ActionSheetPicker-3.0#104
merge tomaskraina-master into master
Merge pull request #105 from tomaskraina/master

Added workaround for a bug in UIDatePicker in count down mode.
Add supportedInterfaceOrientations property. That commit fixes #100
Update podspec to version 1.3.6
Update changelog for version 1.3.6
update header file as requested in #36
Update podspec to version 1.3.7
Update changelog for version 1.3.7
Assign pickerview immediately to self.pickerView after its creation in -configuredPickerView.
Merge pull request #108 from venj/master

Fixed an issue when more than one ActionSheetCustomPicker is used in a ViewController
- Change ActionType enum values name