added curriculum html, also published on laura.makes
swapped tutorial pages demo url for url to a tutorial on pages
i added a step to the tutorial
gitignore updates
Merge branch 'develop' of github.com:LauraHilliger/appmaker into develop
Merge pull request #2187 from flukeout/gitignoreupdates

Gitignore updates
Merge branch 'develop' of github.com:mozilla-appmaker/appmaker into develop