* add elm-format support
* update elm petstore samples
* add trenneman to elm tech comm
* replace dart class with elm class
* revise elm format arguments
* update petstore samples
* Add elm template parameter to the samples testing script
* Update elm-date-extra package; fixes#458
* Update generated elm samples
* Use Elm doc comments; remove some unneccessary newlines
* Update generated Elm samples
* Remove unnecessary parenthesis around non-optional container type