Refactor CompanyDashboard#members to use MetricsHelper

had to update cassette because of previous bug in dates
Add ODC load from metrics API
use new metrics, refactor a bit
Data now comes from metrics-api

Also excised so much cruft.
fix cassettes
Merge pull request #92 from theodi/use-new-metrics

Use new metrics in API
Merge branch 'master' of github.com:theodi/dashboards into feature-gavins-dashboards
Tweak 2014 dashboard (WIP)
Regenerate cassettes
Add non-commercial bookings
Add pie chart widget