Add minutes and seconds to date calculation methods

The resolution for time calculations only went down to hours (start of
previous hour etc). I've added minutes and seconds.
Merge pull request #5 from Tylerc230/master

Add minutes and seconds to the time calculations
adding a new greatest componetns menthod
Merge branch 'master' of https://github.com/mysterioustrousers/MTDates
adding some default, system localized date formatters
fixign a bug with the date/time style and adding another string method
fixing a bug with the date/time style and adding another string method
Attempt to fix GCD issue by using current thread address
updating ISO format to be more standard
updating ISO format to be international standard
more robust date creationg from ISO strings of varying formats
Fix local timezone dependency in tests.

Time zone tests fail if local time zone is anything but Denver, Colorado
USA. Set local timezone in -setup in order to normalize test
environment.
Merge pull request #9 from modocache/fix-timezone-tests

Fix local timezone dependency in tests.

wow great idea. For now anyway, we for sure need to make the tests more flexible with timezones. (I've looked into Kiwi and whatnot and I'm of the persuasion that if the comes-with-it test suite does the job, I use it :) Don't hold me to that, I change my mind a lot. Thanks for the help.
Merge commit 'edc3e1177eafd997bee7a2448ab21a306fe267bc'
Thread address is used as only key in per-thread dictionaries
Merge pull request #7 from dzindra/master

Using MTDates with GCD throws NSInvalidArgumentException
Change expectations based on OS behavior.

NSDateFormatter's default year differs based on iOS version. See
http://openradar.appspot.com/12358210 for details.

Change expectations made in tests based on the default year used by
NSDateFormatter.

- Add -dateFormatterDefaultYear method to MTDatesTests.
- Use -dateFormatterDefaultYear to determine which expectation to make
  in individual tests.

This addresses 4 of 7 spec failures brought up in GitHub issue #10.
Merge pull request #11 from modocache/fix-ios5-tests-defaultyear

Change expectations based on OS behavior.
merging in contributions from others and fixing tests
converting tabs to spaces