Added weeks to diffForHumans
Added diff tests for boundary cases
Reindented lines
Changed diff weeks to have 4 weeks = 1 month
Added tests for humanDiff weeks.
changed test aid to account for different time zones
Added $local, checks if the timezone is local
Tests for $local
Merge pull request #50 from semalead/patch-3

Added $local, checks if the timezone is local
Updated dst comment
Fix test
Changed local implementation to use already implemented offset.
Merge pull request #44 from nicholas-eden/timezone-fix

Test Aid Fix
Merge pull request #34 from dirkluijk/patch-1

Added weeks to diffForHumans
Added utc getter
Updated history and readme