Gemini3d

* h5fortran v3.5.2 improves read() operations to check type and size versus the variable (rank and dims were already checked). This helps avoid weird results when compiler optimizations made glitches with edge cases
* workaround for GCC-10 with MSYS and `-O3` causing random date for MSIS
* several fixes to advanced simulation types discovered while creating more expansive offline CI suite

* enhance cmake FetchContent stack to work while simultaneously capable of exporting targets
* permute HDF5 plasma axes for swapaxis case to allow restart. Update gemini3d.compare for this.
* correct Magcalc.bin MPI issues

Downlaoder enhanced: will now auto-update data when new md5's given. Previously it would never update if the folder or .zip existed.

Strengthen Fortran front-end `gemini3d.run` in several ways

* add optional md5 checksum to downloads
* make reference data downloads automatic, occurring at ctest time by CMake fixtures
* integrate hwloc in a more discrete, sensible way under src/utils/hwloc.
* add msis unit tests
* organize gemini3d.bin tests in a more hierarchal way, unit testing low level parts first

UX: add recommendations at end of Cmake configuration printout. For example;

* suggesting Ninja if Make is being used
* suggesting newer CMake as appropriate
* suggesting `hwloc` use

Added CMake scripts to install/build CMake, Ninja or hwloc, starting from CMake >= 3.7

Raspberry Pi 4 results

Using system lapack, self-built Scalapack 2.1.0, MUMPS 5.3.5


$ ctest
Test project /home/pi/code/gemini3d/build
Start 49: unit:HWLOC
1/49 Test 49: unit:HWLOC ....................... Passed 0.06 sec
Start 28: unit:mpi_basic
2/49 Test 28: unit:mpi_basic ................... Passed 1.50 sec
Start 29: unit:scalapack
3/49 Test 29: unit:scalapack ................... Passed 0.45 sec
Start 30: unit:mumps_basic
4/49 Test 30: unit:mumps_basic ................. Passed 0.46 sec
Start 27: unit:gemini_exe_ok
5/49 Test 27: unit:gemini_exe_ok ............... Passed 0.02 sec
Start 1: gemini:2dns_fang:setup
6/49 Test 1: gemini:2dns_fang:setup ........... Passed 0.66 sec
Start 2: gemini:hdf5:2dns_fang:dryrun
7/49 Test 2: gemini:hdf5:2dns_fang:dryrun ..... Passed 0.73 sec
Start 3: gemini:hdf5:2dns_fang
8/49 Test 3: gemini:hdf5:2dns_fang ............ Passed 17.72 sec
Start 4: gemini:compare:hdf5:2dns_fang
9/49 Test 4: gemini:compare:hdf5:2dns_fang .... Passed 0.29 sec
Start 5: gemini:2dew_fang:setup
10/49 Test 5: gemini:2dew_fang:setup ........... Passed 0.97 sec
Start 6: gemini:hdf5:2dew_fang:dryrun
11/49 Test 6: gemini:hdf5:2dew_fang:dryrun ..... Passed 0.73 sec
Start 7: gemini:hdf5:2dew_fang
12/49 Test 7: gemini:hdf5:2dew_fang ............ Passed 23.69 sec
Start 8: gemini:compare:hdf5:2dew_fang
13/49 Test 8: gemini:compare:hdf5:2dew_fang .... Passed 0.39 sec
Start 9: gemini:3d_fang:setup
14/49 Test 9: gemini:3d_fang:setup ............. Passed 2.07 sec
Start 10: gemini:hdf5:3d_fang:dryrun
15/49 Test 10: gemini:hdf5:3d_fang:dryrun ....... Passed 0.94 sec
Start 11: gemini:hdf5:3d_fang
16/49 Test 11: gemini:hdf5:3d_fang .............. Passed 138.21 sec
Start 12: gemini:compare:hdf5:3d_fang
17/49 Test 12: gemini:compare:hdf5:3d_fang ...... Passed 0.85 sec
Start 13: gemini:2dns_glow:setup
18/49 Test 13: gemini:2dns_glow:setup ........... Passed 0.77 sec
Start 14: gemini:hdf5:2dns_glow:dryrun
19/49 Test 14: gemini:hdf5:2dns_glow:dryrun ..... Passed 1.22 sec
Start 15: gemini:hdf5:2dns_glow
20/49 Test 15: gemini:hdf5:2dns_glow ............ Passed 46.21 sec
Start 16: gemini:compare:hdf5:2dns_glow
21/49 Test 16: gemini:compare:hdf5:2dns_glow .... Passed 0.31 sec
Start 17: gemini:2dew_glow:setup
22/49 Test 17: gemini:2dew_glow:setup ........... Passed 0.80 sec
Start 18: gemini:hdf5:2dew_glow:dryrun
23/49 Test 18: gemini:hdf5:2dew_glow:dryrun ..... Passed 1.31 sec
Start 19: gemini:hdf5:2dew_glow
24/49 Test 19: gemini:hdf5:2dew_glow ............ Passed 69.28 sec
Start 20: gemini:compare:hdf5:2dew_glow
25/49 Test 20: gemini:compare:hdf5:2dew_glow .... Passed 0.44 sec
Start 21: gemini:3d_glow:setup
26/49 Test 21: gemini:3d_glow:setup ............. Passed 1.14 sec
Start 22: gemini:hdf5:3d_glow:dryrun
27/49 Test 22: gemini:hdf5:3d_glow:dryrun ....... Passed 4.32 sec
Start 23: gemini:hdf5:3d_glow
28/49 Test 23: gemini:hdf5:3d_glow .............. Passed 368.89 sec
Start 24: gemini:compare:hdf5:3d_glow
29/49 Test 24: gemini:compare:hdf5:3d_glow ...... Passed 0.96 sec
Start 25: scalapack:BLACSbasic
30/49 Test 25: scalapack:BLACSbasic ............. Passed 0.40 sec
Start 26: scalapack:unit:real64
31/49 Test 26: scalapack:unit:real64 ............ Passed 0.44 sec
Start 31: unit:msis_setup
32/49 Test 31: unit:msis_setup .................. Passed 0.03 sec
Start 32: unit:msis_compare
33/49 Test 32: unit:msis_compare ................ Passed 0.03 sec
Start 33: unit:fangIonize
34/49 Test 33: unit:fangIonize .................. Passed 0.06 sec
Start 34: glow_basic
35/49 Test 34: glow_basic ....................... Passed 0.04 sec
Start 35: unit:interp1
36/49 Test 35: unit:interp1 ..................... Passed 0.01 sec
Start 36: unit:interp2
37/49 Test 36: unit:interp2 ..................... Passed 0.20 sec
Start 37: unit:interp3
38/49 Test 37: unit:interp3 ..................... Passed 14.59 sec
Start 38: unit:diffusion1
39/49 Test 38: unit:diffusion1 .................. Passed 0.11 sec
Start 39: unit:potential2
40/49 Test 39: unit:potential2 .................. Passed 14.51 sec
Start 40: unit:mpi:excessCPU
41/49 Test 40: unit:mpi:excessCPU ............... Passed 0.01 sec
Start 41: unit:pathlib
42/49 Test 41: unit:pathlib ..................... Passed 0.02 sec
Start 42: unit:namelist
43/49 Test 42: unit:namelist .................... Passed 0.01 sec
Start 43: unit:compiler_vendor
44/49 Test 43: unit:compiler_vendor ............. Passed 0.00 sec
Start 44: unit:DateFormats
45/49 Test 44: unit:DateFormats ................. Passed 0.00 sec
Start 45: unit:DateRollover
46/49 Test 45: unit:DateRollover ................ Passed 0.01 sec
Start 46: unit:SolarZenithAngle
47/49 Test 46: unit:SolarZenithAngle ............ Passed 0.00 sec
Start 47: unit:magcalc_exe_ok
48/49 Test 47: unit:magcalc_exe_ok .............. Passed 0.01 sec
Start 48: unit:gemini3d_run_ok
49/49 Test 48: unit:gemini3d_run_ok ............. Passed 0.02 sec

always build gemini3d.compare so that when BUILD_TESTING=off, only the basic gemini.bin tests remain built and runnable by `ctest`. Because of the complexity of the stack, it's not wise to build absolutely no tests. At least one should ensure the gemini.bin numerics function correctly.