Shelving work on live search; #449

We need live search to populate the list of people who deserve the money
for Gittip, but we need lower-cased usernames (#503) to properly implement
search.
Make querying case-insensitive; #449
Start wiring up live search; #449
Start implementing with AngularJS: #449

This adds a _lookup.json call that populates a simple table when the
user enters input.
Merge branch 'master' into for
Start styling the live search; #449
Bump version to 8.0.7
Bump version to 8.0.7-dev