Enyo 360 Support 'Persian calendar'

Issue
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Currently moon.Calendar only support gregorian calendar.
However fa-IR (Iran) and fa-AF (Afghanistan) use Persian calendar instead of Gregorian.
 
Fix
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Implement following requirements
Moonstone widget Persian calendar shall need to be in sync with the opinion from Iran local office
: (Abbreviated) localized strings for the days of the week and month
: Starting from Saturday
: Right to left (Saturday at the rightmost, Friday at the leftmost)

Enyo-DCO-1.1-Signed-off-by: David Um david.um@lge.com
@ehoogerbeets 
I find another issue.
After using 'julian', Persian calendar shifted 2 dates.
In this line, this._dayFmt use "gregorian" calendar. 
Should I change it with "julian"?

Actually, I did. but Persian calendar still shifted 2 dates.