Prefer #current over #now for times in Rails

* My understanding is this is preferred for Rails dependent code as it
  will make it more resilliant against tz issues.
* http://stackoverflow.com/questions/6635363/what-is-the-difference-between-date-current-and-date-today

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Your gem came up in discussion in our chatroom. I couldn't resist a peak. Further I could resist the urge to give back if I noticed anything.

Let me know what you think!