Add angular view for dashboard mockup at /dashboard
Add DashboardCtrl getting waterpoint stats
Add selectors for region, district, ward to dashboard view
Restrict districts/wards by region/district if selected
Add class content to ng-view div
Allow restricting status, stats endpoints with query params
Update embedded map in dashboard view
Add dashboard link to main menu
Add NavCtrl to provide location path
Use location path to select active nav element