Improved Full Reader

Mass and stiffness matrices from the full reader before 0.24 needed to have their constrained degrees of freedom removed from the arrays if they were constrained within ANSYS. These constrained degrees of freedom are now automatically removed.

The sort option has been added back. Sorting is disabled by default. See the latest release notes:
http://pyansys.readthedocs.io/en/latest/loading_km.html