Bootstrapping from url. Keeping state.

Dashboard is able to bootstrap itself from a url like:
http://dashiki.com/something#project=enwiki,dewiki/metric=newlyregister,rollingactive

Changes on selection are published to url

Testing is required some contortions to avoid access
to window.location via URI.js

Bug: 70887
Change-Id: I454de470fa39d59ace9e95255856b27f4fb4b3ac