This is unmaintained, and, looking back, the modifications I made were actually very weird and ugly.
The repository is here for historical reasons.
sinatra-twitter-bootstrap is licensed under Apache Software License 2.0 (ASLv2) http://www.apache.org/licenses/LICENSE-2.0.txt
Bootstrap 3.0 is licensed under Apache Software License 2.0 (ASLv2) http://www.apache.org/licenses/LICENSE-2.0.txt
JQuery is licensed under MIT license. html5Shiv is licenced under MIT/GPL2 (https://github.com/aFarkas/html5shiv)
Any code added by me is licensed under MIT LICENSE