Incorporate exploratory work

[tomalrussell]

Pieces of analysis prototyped outside of this workflow:

• built capital downscaling, business disruption, trade OD downscaling
  • https://github.com/nismod/open-gira/commits/feature/buildings-exposure
• direct damages of floods to power plants
  • https://github.com/thomas-fred/thai_2011_flood_powerplants
• trade flow allocation and disruption
  • https://github.com/thomas-fred/trade-flow-allocation

Consider rework to add more structure and separation, aiming to make it easier to add well-defined sub-workflows, while making use of shared functionality (e.g. shared dependency on some global datasets, shared use of impact models, or data dependency between chunks analysis where output provides input to another).