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
Update _search.html.erb
added files for lesson 13
updates to L13 slides
Update README.md
Update README.md
updates from lecture code-alongs
added files for lesson 14
L15 updates
 updates
updating files