* Add overloads for ntpfa

* Make it easier to use non-TPFA setups

* Add kgrad to setup_reservoir_model kwarg

* Update flux_nfvm.jl

* Improvements to NFVM support

* NFVM: Clean up flux code

* Fix sign for NFVM flux with gravity

* Pass on trans to NFVM code

* Improve logic for NFVM potential

* NFVM: Correct typo

* Hacked in diffusion support for NFVM

* Ensure that NFVM potential is always non-negative

We do this by picking a new reference depth

* Update porousmedia.jl

* Put in place some preparation for fvm asm

* Update discretization settings to account for new features

* Fix general_ad branch in tpfv domain

* Hack for NLDD without TPFA hard coded (won't work for ASPEN)

* Handle new discretizations in thermal

* Refactor thermal to not use composite system

* Remove export of undefined system

* Don't add rock parameters for wells

* Update thermal test

* Clean up thermal tests

* input file: Use simpler thermal system

* Thermal: Apply perforation mask to perforation flow

…System