add path setup so that one could run test.py without setting pysolid as python module (via path setup or pip)
save figs in test dir
open figs in macOS and linux for visual checking
test/precompile_solid.sh:
exit the shell if any command fail
run test.py after building
print passing msg
solid.cpy*.so: update witth numppy version constraint for improved compatibility
add test/conda.txt for pre-compilation with numpy version constraint of a upper limit, to maximize the compatibility, because the solid.cpython.so file generated from lower numpy version works for envs with higher numpy versions.
test/test.py:
test/precompile_solid.sh:
solid.cpy*.so: update witth numppy version constraint for improved compatibility
grid: more robust call of numpy.loadtxt()