new import csv and model changes

import from a new csv with changed columns
add council_districts and report phase to model
add filter by district to project mixin
add dsitrict to project list item
add district shortcuts to shortcut list

new route for districts
add district project counts to dashboard
add stats mixin for model

new mixing for aggregating stats for projects
add a new manager for projects
add a new Model Phase (for later use)
refactor widgets

move to mixins
allow use in other places
add widget and widgetrow objects
refactor widget display

new template widgets
new templatetag
include on dashbaord
Merge branch 'districts'
Merge branch 'widget_improvements'