assets/bundles: Use rawgithub.com instead of raw.github.com

Fixes strict mimetype handling in debug mode
views/flight: Import cleanup
Merge pull request #125 from Turbo87/import-cleanup

views/flight: Import cleanup
Merge pull request #124 from Turbo87/mimetype

assets/bundles: Use rawgithub.com instead of raw.github.com
assets: Fixed Twitter Bootstrap URLs