Oops, some blue exercises were missing answers.
Bug fix: button at bottom of solution popup was covered
Don't hide instructions once the program has finished executing
Bug fix: Run button let you click it, even if outputs were unpredicted
Split out videos from yellow exercises into their own purple exercises.  Hosting videos on YouTube now.
Bug fix: console didn't automatically scroll if output got too long.
Make it more obvious when learner hasn't finished inputting yet.
Don't show stdin-inputted-text to the console, even in yellow, because it can be confused with output.
Say "Run" instead of "Study" or "See" so it's clear what the learner is supposed to do.
Fit longer video scripts onto the screen.
Smaller font size for video notes.
Broke gets lesson into two: one with one input and one with two inputs.
Removed mailchimp signup and Twitter news for now.
Split curriculum.yaml into one file per topic.
New logo and slogan
Added lessons 6 and 7.
Oops, topic num was one too high.
Oops, topic files weren't getting loaded in order.
Set width and minimal for Mobile Safari
Don't use Code Mirror for Mobile Safari; just use textarea.