Improve the CIP + some minor changes

[smcalilly]

Overview

Closes:

• 166

• 167

• 170

Includes:

• changes in the CIP UI
  • added columns to the tables
  • added subrows to the tables to show the phase funding
    • some minor code tweaks to accommodate this
  • calculations for the portfolio summary
• backend:
  • calculations for the zone distribution via a new signal + tests
  • refactored the local asset signal (added a delete signal and refactored the code)
  • added data to send in the portfolio view
• minor bug fixes discovered along the way (noted/explained in this PR's comments)
• Added an actual_cost field to the phase model based on feedback

Testing Instructions

Apparently review apps don't work with heroku and github anymore? So download this branch and follow the steps in the readme to get it running locally.

For testing:

• Create a phase or two.
  • Add some GIS assets.
  • Add some funding.
• Test the CIP planner. Make sure all of the calculations work, particularly the zone distributions.
  • Add/remove phases
  • Test the funding dropdown subrows
  • Test the name and saving of a portfolio