fix issue with dropdown menus in collapsed navbar
change next and previous chapter links to use icons instead of text (to preserve some space on the navbar)
fix issue with dropdown menus in collapsed navbar for static pages
improve navbar layout
fix theme path in devcourse
Merge pull request #125 from isaacdontjelindell/bootstrap-integration

Fix navbar bugs when navbar is collapsed
Merge pull request #126 from isaacdontjelindell/bugfix

Fix theme path in devcourse