RAD-157 Add formatter for javascript files
our javascript files are a mess, they should follow a style guide as well and
be formatted automatically
* switch to maveninformatics formatter fork since his releases are up to date
and javascript formatting works
* move datatables in subfolder so they can be excluded from formatting via its
folder and tinymce is also in a subfolder
* format .js files only in omod and exclude third party files like datatables
and jquery
* remove <script> from .js files so they are formatted
* most js are already included with opnmrs:htmlinclude,
radiologyOrderList.js needs a little workaround because
it has spring message tags that need to be rendered by jsp compiler
* update readme
* run travis only against java7 since java 6 is not supported by formatter
