Adds localization control over a time's suffix format.
[Issue #57] Fixing significance comparison of week unit
Adding significantUnits property, to allow only significant units to be displayed in relative time calculations
Using array object literals
Using number object literals
Using object subscripting
Adding __autoreleasing to out parameter
Using NSStringFromSelector(@selector()) for NSCoding
Implementing NSCopying
Changing NSString properties to copy
Removing unnecessary class extension
Merge branch 'master' of github.com:scraton/FormatterKit into scraton-master

Conflicts:
	FormatterKit/TTTTimeIntervalFormatter.m
Bumping version to 1.4.0
[Issue #59] Fixing duplicate localized string keys