Add lineending

Grunt usemin uses a regex parser which craps out if you look at it
wrong. Certain line endings and minified html is a common source of
failure for usemin. Converting the line endings ensures that usemin
will still work after editing the templates. If necessary, grunt
js-beautifier can be added as well, but for now that won't be needed.
This fixes the bug in the previous commit (usemin not working).