v6.1 bugfix: WEC-Sim applications (#71)

* Controls MPC fix

* WECCCOMP MPC Fix

* models back to 2020b

* re-fix Controls MPC to work with fullDir

* re-fix NMP to work with fullDir

* fix Controls MPC library block

* fix body block WECCCOMP MPC

* fix OWC library links for v61

Author: dforbush2