remove extra whitespace in Dispatcher.js
remove error log in Headliner.js
Add mozhosts query to PlacesInterestsUtils.
Compute interests for progressive slices of top mozhosts
Expose Controller API to get interests computed on mozhosts
Expose mozhost computed interests in dev UI
Add mozhosts interests to Dispatcher payload
Nove getPlacesHostForURI to Utils
Move getBaseDomain to Utils
Implementation of UrlClassifier
Remove unused notification
Only populate workersData if messageId is "resubmit"
This is done to avoid clash with UrlClassifier
Add error handling to UrlClassifier
Fix and a test to title classification
Allow for empty url
Fixes #81: Enable url+title classification in UI