Ad-hoc building with m-file scripts
remove unnecessary complication
Improve "build system" and clean up after
Add debugger flag and fix indentation
Debuggin segfault on MATLAB/Linux

Octave is fine, but the Cython module inside MATLAB appears
to set its `static __pyx_m` to `NULL` before we get to
`__Pyx_Globals()`, which does the equivalent of `globals()`.

Next: find all access on `__pyx_m` and trace it.