Major Improvements to the CI mechanism

• MacOS:

  • Updated the build parameters for Mac CI-machines.
  • Added the 1st-order dependencies of the relatively-referenced Qt libraries (if any). [resolves #495 (closed)]
  • Added a proper path for the man package on MacOS to prevent an error during package building.

• Python package: Changed the wheel producing command according to the latest pip documentation to reduce the Python dependencies.

• Added a fatal error message in case libformfactor is not found.

Closes #495 (closed)