Adding review section
Updating index page
Various updates to review slides
Adding exercises and cleaning up slides
adding lesson 11
Update ga.css
Adding lesson 12
lesson 13 and 14
Adding assets to folder
adding lesson 15 and assets
adding all lessons.
added files for lesson 10
Fixing upstream merge conflicts
Adding seeds
Merge pull request #26 from bswinnerton/adding_seeds_to_lesson_11

Adding seeds to lesson 11
added L12 exercises, slides, L11 solutions, and L12 code-along solution
Updating homepage
Merge pull request #28 from bswinnerton/index-update

Updating homepage
Adding video to Lesson 11
Merge pull request #29 from bswinnerton/index-update

Adding video to Lesson 11