overhaul the home page and navigation

add basic website content (about, credits, site preview, etc)
add styling to the tutor keyboard; fix bugs where non-letter keys were not showing up or changing
bring webfont to current server, to satisfy security check in firefox
always go to the main page when logging out
add dictionary querying tools (with accompanying tests)

add most common English words list
restore ploverdojo's app.yaml
quiz finally gets words to display, based on query!

created new method /quiz/data that serves json quiz data.
dictionary tool now support converting to binary values (for the quiz)
add little dialog box that says you are finished with quiz
clean up the quiz.js.