starting to add local storage
Merge branch 'master' of github.com:kgraves/gradebook
Merge branch 'master' of github.com:kgraves/gradebook

Conflicts:
	src/modules/class.js
Merge branch 'master' of github.com:kgraves/gradebook
saving and loading from chrome.storage.local works
Merge branch 'master' of github.com:kgraves/gradebook