Minor UI refinements.
Merge branch 'master' of github.com:OpenPhilology/phaidra
Merge branch 'master' of github.com:OpenPhilology/phaidra
Merge branch 'master' of github.com:OpenPhilology/phaidra
Styling for Intro to Thuc/Nouns slide.
Merge branch 'master' of github.com:OpenPhilology/phaidra
Merge branch 'master' of github.com:OpenPhilology/phaidra
HTML bug fixes and styling for Intro to Nouns slides.