Progress on including all challenges; accidental work on master, not sure merged properly.
Better markdown formatting for Overall Challenges.
Scrapes Overall Challenges properly.
Overall Challenges have link to parent page, not parent section.
Slight refactoring.
Scrapes Overall Exercises properly.
Added links to top of page after each notebook scraped.
Merge pull request #46 from ehmatthes/all_exercise_page

All exercise page