Add an extra newline if there isn't one

* If there is no extra newline at the end of file, the separator gets
  rendered as part of the changelog.

* Add --color and --format documentation options to rake rspec as it
  makes the tests more readable when running locally as well as on
  travis-ci.
Merge pull request #6 from arangamani/new_line_fix

Add an extra newline if there isn't one