Fix custom date format on DateTimePicker.
Added missing default options on DateTimePickerType.
Fix scope of 'last-year' ranges options on DateRangePicker.
Add default option 'calendarWeeks' on DateTimePickerType.
Merge pull request #51 from Restless-ET/fix_date_format_on_datetime_picker

Fix custom date format on DateTimePicker.
Merge pull request #52 from Restless-ET/fix_last-year_range

Fix scope of 'last-year' ranges options on DateRangePicker.