Index categories
Add views for category and featured app listings.
refactor install code out of search view (bug 995418)
Make the search endpoint work at /search for Fireplace compatability.
Merge pull request #13 from chuckharmston/cats

Add views for category and featured app listings.
Use versions that actually work in package.json (bug 995980)
Point webapp manifest to correct appcache URL (bug 995980)
Fix path to content-ratings.js (bug 995980)