Fixes #88, suports DateTime in presence of ActiveSupport's Time.zone
Add test for #88
Merge remote-tracking branch 'yaauie/issue-88/datetime-vs-activesupport-timezones'

* yaauie/issue-88/datetime-vs-activesupport-timezones:
  Add test for #88
  Fixes #88, suports DateTime in presence of ActiveSupport's Time.zone