Progress bar for how much users have learned

[jkokocha]

To motivate learning about APIs, there is an idea to create a personal progress bar for each user indicating how much they've learned. This progress bar could be linked to their user accounts #32, or saved using some other clever method. The progress bar should be easily accessible from any page on the website, and users should be able to see their progress bar increase live as they're learning.

The progress bar could be connected to how many pages they've read, how many quizzes they've answered correctly on or any other future feature. The idea is that progress will reach 100% when the user has explored all the website has to offer, but this might change if issue #31 is implemented.

If the website is large enough when this is first implemented, another idea is for there to be multiple progress bars linked to specific skills, or possibly a score/points system to replace the bar idea, allowing for infinite learning.