Merge pull request #1 from leibovic/master

Clean up code, add install button, get rid of characters on cards
Merge pull request #3 from leibovic/master

This pulls in all my changes, but it looks like it only pulls them to the master branch. I made the gh-pages branch the default on my fork, but I don't think I have the permissions to do that here.
testing absolute manifest url
Clean up for workshop, adding in 'tasks' to the index file
pulling in margaret's css tasks
Merge branch 'master' of github.com:lsblakk/browser-pairs into workshop
Merge branch 'gh-pages' of github.com:lsblakk/browser-pairs into workshop