erica/NSDate-Extensions — pull request #40 by lukaszmargielewski (2013-11-01 07:55:17+00:00)
Title: ADDed NSCalendar static singleton

Very often in date operations, the performance bottleneck is creating NSCalendar object (surprising, but yes - clearly visible when profiling). I have added static currentCalendar method as autoupdating calendar and refer CURRENT_CALENDAR constant to it.