Make time specs timezone independent
Make time specs timezone independent

* Changed spec to add getutc to lock specced time to UTC

* Time.now automagically converts to_local; this means the test suite
  passes in olbrich's timezone but not in the other 23/24ths of the
  Earth ;-)

arthurljones/ruby-units,apecherin/ruby-units,pecha7x/ruby-units,olbrich/ruby-units