Don't search empty queries
Use new VS directive in streamsearch

For now. Soon we will merge this with the page search and make things
much more similar.
Multi-provider user search field
Don't choke when oauthlib can't parse a request
dropped /app/ from embed.js in bookmarklet
assets, combine!
two big bundles: hypothesis-app.js & hypothesis-assets.js

-assets.js is used via embed.js
-app.js is used in /stream, etc.
split out css & js for inject
breaking out css/js assets