Achieve feature parity with initial Memphis Demo

[masonlr]

Goal

The initial Memphis demo had several features that are not yet in the refactored version.

Acceptance criteria

• [ ] Simulations progress visible in front end
• [ ] Output files directly downloadable (i.e. individual csv file, not only as zip archive)
• [ ] Time series results visible in front end
• [ ] Input graphic models visible in front end, i.e. can configure tank

Out of scope

• Simulation videos viewable from front end

Implementation notes