Pyquaternion

Allow Quaternions to be initialised from integer matrices:
Includes:

* https://github.com/KieranWynn/pyquaternion/pull/56
* https://github.com/KieranWynn/pyquaternion/pull/57

Fixed deployment process

Updates to release versioning and deployment

Build pipeline fixes

Minor fixes from community PRs
Includes:
https://github.com/KieranWynn/pyquaternion/pull/43
https://github.com/KieranWynn/pyquaternion/pull/44
https://github.com/KieranWynn/pyquaternion/pull/45
https://github.com/KieranWynn/pyquaternion/pull/46
https://github.com/KieranWynn/pyquaternion/pull/49

Fixes a bug in slerp implementation