The tether docs say no word about how to get it running (only bower install tether
which downloads it all). For JS it is clear, since there is only one relevant file in the dist folder of the repo.
But which files are needed from https://github.com/HubSpot/tether/tree/master/dist/css? Is tether.min.css
enough, or is tether-theme-basic.min.css
also needed?