Register an offence when the last hash parameter has braces in BracesAroundHashParameters cop.
Merge pull request #567 from dblock/braces-in-hash-parameters-last-only

Fix: register an offence when the last hash parameter has braces.
Credited contributors and fixed lack of periods at the end of changelog lines.
Merge pull request #568 from dblock/changelog

Credited contributors and fixed lack of periods at the end of changelog lines.
Create Output cop to check for output in Rails