As mentioned, here's a quick cleanup of files that aren't relevant to the project before. If needed, I can split this up into multiple PRs that are each code-reviewed.
gets rid of doc/ folder (it's never updated)
gets rid of fonts/ folder (Bootstrap no longer uses glyphicons, we use FA5 now!)
removes all references to jQuery and uses jQuery slim, drops jQuery
removes unneeded images
removes duplicated license from HTML5 Boilerplate (therefore Apache is the license now)
As mentioned, here's a quick cleanup of files that aren't relevant to the project before. If needed, I can split this up into multiple PRs that are each code-reviewed.