Add a newline add the end of the JSON file

Editors like Vim add a newline at the end of the file when saving. git
then complains loudly about the "change":

  -]
  \ No newline at end of file
  +]

Add a newline to the JSON file to be compatible with editors.
Merge pull request #83 from neingeist/fix/json-newline-at-end

Add a newline at the end of the JSON file