Unclear documentation of dependencies

[Artemkth]

A fact that pyspinw requires additionally 'matlab compiler SDK' component should be stated clearly somewhere, I've spent too much time tracking down the error because

spinw/python/pyspinw/__init__.py

Line 54 in ce8dd43

except RuntimeError:

discards the exception message. I would propose also to change it to something like this:

except RuntimeError as e:
                print(f'A fatal error occured while initialising Matlab version {matlab_version} at {matlab_path}:\n {str(e)}')
                pass   

to make it more informative!

[mducle]

Ah yes, sorry. I assumed that people would be using the MCR, and that if they had a Matlab license would just be using the Matlab version and not Python.

I'll make a change to the error message saying that if you have a full Matlab installation you also need to install the Compiler SDK toolbox.