Cleanup git history of large files (`bower_components`)
Git tree is ~30 MB large even though the project is very simple, this is because `bower_components` is still in the Git tree which makes no sense - cloning forever. I removed it from versioning in my fork, but didn't do the actual version histoy cleanup using `git filter-branch --tree-filter 'rm -rf bower_components' --prune-empty HEAD` because that require the project maintainer to be aware. Read more here: https://help.github.com/articles/remove-sensitive-data/
