adding tests for setting zone
adding tests for diff and from
adding tests for unix timestamp and unix millisecond offset
zone tests for cloning, start/endof, resetting offset with local and utc
zones outputting correct timestamped date with toDate
adding zone tests for isSame, isBefore, and isAfter
adding some tests for zones outside the -12 to +12 range
adding tests for adding/subtracting over dst
fixing travis
undoing grunt task test files
adding tests for parsing strings for timezone info
adding tests for shorthand zone setters via -15 to +15
fix as() tests
added slovak language
Merge pull request #707 from icambron/durations-as-anything

fix as() tests
Merge pull request #709 from k2s/develop

added slovak language
Update ar.js

Two versions in months together and changes in weekdays,
so that the translation is more general.
Partially update ar tests 'format'
Update ar.js

Update ll of 'format' in tests
Update ar.js

Attempt to update 'format month' in tests for ar