Adding method to get the week number of a date
Added year, hour, minute methods
added a utc timestamp
fixed the utcTimestamp
update README
Internationalizing stringDaysAgoAgainstMidnight: strings
Switches back to statically loaded NSCalendar and NSDateFormatter, uses dispatch_once to lazy load these once when needed, as +(load) can be called too early
Some more fixes to ensure +initialize_statics has been called (once)
Merge pull request #13 from alsotang/master

update README
Applies fixes for ARC from patch manually—could use some testing
Merge branch 'pullrequest' of https://github.com/SinnerSchraderMobileMirrors/nsdate-helper into SinnerSchraderMobileMirrors-pullrequest
Adapting merged pull request to use static _calendar
Merge branch 'SinnerSchraderMobileMirrors-pullrequest' into develop
Merge branch 'utcTimeStamp' of https://github.com/SinnerSchraderMobileMirrors/nsdate-helper into SinnerSchraderMobileMirrors-utcTimeStamp
Merge branch 'SinnerSchraderMobileMirrors-utcTimeStamp' into develop
DRYs up use of initializeStatics (use +sharedCalendar and +sharedDateFormatter instead of _calendar, etc)
Merge branch 'i18n' of https://github.com/hectr/nsdate-helper into hectr-i18n

Conflicts:
	NSDate+Helper.m
Merge branch 'hectr-i18n' into develop
Fixing string method

- Adding timestampLocaleIdentifier method
- Setting a non-customized en_US_POSIX locale instead of the current
locale
- Using timestampFormatString instead of dbFormatString