Add visitors query and refactor query.js
Add crossfilter
Fix package versions
Use angular limitTo filter
That didnt work out so well...

This reverts commit 9e23d99787d1d40572dbd084f3aabc899394b1d9.
Very crude version of cf filtering for visitors
update readme
Update readme some more
filterService, consolidate metrics to use xf
extract each metrics model into a service, abandon filterService idea
Merge branch 'master' into heroku
Update build directory to latest version
Start Using nvd3 for charts
Merge branch 'master' into heroku
Update build