Rename Eclipse to Flow

[wouterjdb]

Closes #37.

[wouterjdb]

@anders-kiaer I keep getting,

================ Starting main simulation loop ===============


Report step  0/247 at day 0/3312, date = 06-Nov-1997

Warning: Keyword 'BASIC' is unhandled for output to file.

Warning: Keyword 'CONV' is unhandled for output to file.

Time step 0, stepsize 1 days, at day 0/8, date = 06-Nov-1997
Time step summary: newton its =  2, linearizations =  3 ( 0.066 sec), linear its =   2 ( 0.025 sec)

Time step 1, stepsize 3 days, at day 1/8, date = 07-Nov-1997
Time step summary: newton its =  2, linearizations =  3 ( 0.052 sec), linear its =  18 ( 0.063 sec)

Time step 2, stepsize 4 days, at day 4/8, date = 10-Nov-1997
Time step summary: newton its =  2, linearizations =  3 ( 0.055 sec), linear its =   4 ( 0.031 sec)

Report step  1/247 at day 8/3312, date = 14-Nov-1997

Time step 0, stepsize 8.5 days, at day 8/25, date = 14-Nov-1997

Error: [/build/opm-simulators-4CUPDM/opm-simulators-2019.10-rfinal/opm/simulators/flow/BlackoilModelEbos.hpp:268] NaN residual found!

Problem: Solver convergence failure - Numerical problem encountered
Timestep chopped to 2.805000 days


Time step 0, stepsize 2.805 days, at day 8/25, date = 14-Nov-1997

Error: [/build/opm-simulators-4CUPDM/opm-simulators-2019.10-rfinal/opm/simulators/flow/BlackoilModelEbos.hpp:268] NaN residual found!

while running the test run. So it initializes fine, I've looked at it in ResInisght, it starts to run but after a few timesteps there are NaN's experienced.... I've been breaking my head over this but I don't see any obvious reasons for the simulation to be different from before the PR (which it clearly seems to be) as I've just done some renaming.

Seen anything like this in the recent weeks that might help? Or do you see any renaming that could be suspicious? Thanks!