Proshade

The changes to previous version include:

1) Map re-sampling: Map re-sampling slightly moves (sub-index) position of the internal map, which causes issue for translation map. This has been improved, but not completely removed.
2) Symmetry detection: All polyhedral symmetries are always sought, no longer stopping if larger polyhedral symmetry is found.
3) getopt_port only: Now the external getopt library is used exclusively instead of only on Windows. This is because older GCC version were mixing system and external getopt files, causing segfaults.
4) M_PI: Older GCC version have cmath.h header without M_PI definition (which is not necessarily part of the header, but Unix libraries typically have it there). This has now been remedied and M_PI definition is no longer required.

This release introduces minor changes:
1) The functions for computing cyclic group elements from axis and fold as well as for joining multiple cyclic group elements lists into a single list for a larger group are now exposed to python.

This release introduces two major changes:
1) The polyhedral symmetry detection now works as intended.
2) ProSHADE now installs from Pip and from source on Windows 10 (64-bit only)