the performance summary at the end of a Norne run which are printed by
`flow_ebos` now looks like this on my machine:
```
Total time (seconds): 773.757
Solver time (seconds): 753.349
Assembly time (seconds): 377.218 (Failed: 23.537; 6.23965%)
Linear solve time (seconds): 352.022 (Failed: 23.2757; 6.61201%)
Update time (seconds): 16.3658 (Failed: 1.13149; 6.91375%)
Output write time (seconds): 22.5991
Overall Well Iterations: 870 (Failed: 35; 4.02299%)
Overall Linearizations: 2098 (Failed: 136; 6.48236%)
Overall Newton Iterations: 1756 (Failed: 136; 7.74487%)
Overall Linear Iterations: 26572 (Failed: 1786; 6.72136%)
```
for the flow_legacy family, nothing changes.
Another polymer-specific overload of computeFractionalFlow()
has been added in support of this (this overload deals with
compressible properties.
Also added pressure normalization for situations with arbitrary
absolute pressure.
They do this by using the class PolymerInflowFromDeck
instead of PolymerInflowBasic if there is a WPOLYMER
keyword somewhere in the deck epochs. If there is no
WPOLYMER, the parameters 'poly_start_days' etc. will
be used to construct an instance of PolymerInflowBasic
instead.
