Log Message:
Update ruby-parslet to 1.5.0.

= 1.5 / 27Dec2012

  + Handles unconsumed input at end of parse completely differently. Instead
    of generating a toplevel error, it now raises an error in every branch
    of the parse. More information in the resulting exception ensues! Thanks
    again to John Mettraux for inspiration & acceptance specs.

    NOTE that this means that the UnconsumedInput exception is gone, since the
    unconsumed input case is nothing special anymore.

  * This history now finally reads like the Changelog of the linux kernel.
    Meaning that probably no one ever reads this.

  + Captures and parsing subsequent input based on captured values. This has
    been long overdue - finally you can parse HEREdocs with parslet!