throw swig exception if vina error occurs

[shazj99]

While doing large scale virtual screening using vina, the python process may corrupt frequently. The reason of corruption is the calling of exit() in C++ codes, so we add a swig runtime exception to throw it out instead of exit directly.

[iprotsyuk]

Hey, I'm wondering if there's any perspective to get this merged? This is a very useful fix for large scale virtual screening

[shazj99]

In large virtual screening, we hope we can process all molecules in one single python process, and it is not very user-friendly if the process exits directly while encountering an abnormal molecule. This patch will throw an exception which can be caught and the process can continue.
@diogomart Can you share your thoughts and suggestions with me?

[diogomart]

Sorry for taking so long. This is great 👍