Update bootstrap.css; for some reason it was missing an entire section (hiccup in Bootswatch?)
Remove unnecessary reference to highlight.js
Replace highlight.js with custom version, with more languages
Add check for numPlayers < 0
Fix regex bug (whitespace is \s, not \w)
Add reinitialize method to admin panel
Fix bug with exercise creation; lang was not being saved
Add NON_TYPEABLES; '.comment' is not the only undesirable class