Update of the mesa_r15140 interface

[lucasciarini]

Update of the mesa_r15140 interface, adding getters required to make it compatible with TRES:

• get_core_radius
• get_convective_envelope_mass
• get_convective_envelope_radius
• get_wind_mass_loss_rate
• get_apsidal_motion_constant
• get_gyration_radius

Update of the evolve_until subroutine in mesa_interface.f90 solving timestep issues occuring in the previous version when the subroutine was called multiple times in a row.

The modified script files are interface.py, interface.f90 and mesa_interface.f90, all in src/amuse/community/mesa_r15140.

Tests scripts are provided in src/amuse/community/mesa_r15140/Tests.

[LourensVeen]

Hi Luca,

Thanks for this PR! I'll let Steven judge the astrophysics, but code quality looks fine to me overall. I do have two more software-technical points.

First, you added tests, which is great! However, they plot their results, which means that a human would have to look at those plots to see if they make sense. We'd really like to be able to run the tests automatically (there are a bunch of tests in src/amuse/tests actually that are set up for this), for which we need some assert statements in the test that check whether the result is as expected, and which crash otherwise.

Would it be possible to add those?

I'm currently nearing the end of a big project to replace the AMUSE build system, and that also reorganises those tests in src/amuse/tests, so it's fine to have them as separate scripts in Tests/. I'll merge them in with the rest when that new build system lands so that they can be run automatically with everything else, ensuring that your additions won't be broken by some future change.

Second, the fix to the loop causes some repetition, and I think this part could be written more compactly, but I need to have a more careful look at a more reasonable hour. I'll post if I find a better solution.