Install files under <src_dir>/library/simulink-library/MomentumVelocityControl/src in <install_prefix>/mex/+wbc/simulink/MomentumVelocityControl to simplify use from install

[traversaro]

Fix #140 .

This is the difference in the installation paths:

--- <unnamed>
+++ <unnamed>
@@ -168,12 +168,12 @@
 -- Up-to-date: /home/traversaro/whole-body-controllers/build/install/mex/+wbc/simulink/WBC_lib_main.slx
 -- Up-to-date: /home/traversaro/whole-body-controllers/build/install/mex/+wbc/simulink/slblocks.m
 -- Up-to-date: /home/traversaro/whole-body-controllers/build/install/mex/+wbc/simulink/momentumVelocityControl_lib.slx
--- Up-to-date: /home/traversaro/whole-body-controllers/build/install/mex/+wbc/ComputeContactJacobianWithFeetContactFCN.m
--- Up-to-date: /home/traversaro/whole-body-controllers/build/install/mex/+wbc/ComputeReferences.m
--- Up-to-date: /home/traversaro/whole-body-controllers/build/install/mex/+wbc/ComputeReferencesController.m
--- Up-to-date: /home/traversaro/whole-body-controllers/build/install/mex/+wbc/SupportPolygonWRTContactStatusFCN.m
--- Up-to-date: /home/traversaro/whole-body-controllers/build/install/mex/+wbc/casadi_block.m
--- Up-to-date: /home/traversaro/whole-body-controllers/build/install/mex/+wbc/centroidalConversion.m
--- Up-to-date: /home/traversaro/whole-body-controllers/build/install/mex/+wbc/centroidalTransformationT_TDot.m
--- Up-to-date: /home/traversaro/whole-body-controllers/build/install/mex/+wbc/fromFloatingToCentroidalDynamics.m
+-- Up-to-date: /home/traversaro/whole-body-controllers/build/install/mex/+wbc/simulink/MomentumVelocityControl/ComputeContactJacobianWithFeetContactFCN.m
+-- Up-to-date: /home/traversaro/whole-body-controllers/build/install/mex/+wbc/simulink/MomentumVelocityControl/ComputeReferences.m
+-- Up-to-date: /home/traversaro/whole-body-controllers/build/install/mex/+wbc/simulink/MomentumVelocityControl/ComputeReferencesController.m
+-- Up-to-date: /home/traversaro/whole-body-controllers/build/install/mex/+wbc/simulink/MomentumVelocityControl/SupportPolygonWRTContactStatusFCN.m
+-- Up-to-date: /home/traversaro/whole-body-controllers/build/install/mex/+wbc/simulink/MomentumVelocityControl/casadi_block.m
+-- Up-to-date: /home/traversaro/whole-body-controllers/build/install/mex/+wbc/simulink/MomentumVelocityControl/centroidalConversion.m
+-- Up-to-date: /home/traversaro/whole-body-controllers/build/install/mex/+wbc/simulink/MomentumVelocityControl/centroidalTransformationT_TDot.m
+-- Up-to-date: /home/traversaro/whole-body-controllers/build/install/mex/+wbc/simulink/MomentumVelocityControl/fromFloatingToCentroidalDynamics.m
 -- Up-to-date: /home/traversaro/whole-body-controllers/build/install/mex/+wbc/simulink/utilityBlocks_lib.slx

[traversaro]

fyi @fabiodinatale @CarlottaSartore @Andrea8Testa

[gabrielenava]

thanks @traversaro, merging!