Changed ModelVisualizer to realize through Velocity stage so it can report muscle activations using new muscles. (Activation was available at Position stage before.)
Changed ModelVisualizer to realize through Velocity stage so it can report muscle activations using new muscles. (Activation was available at Position stage before.)

git-svn-id: 9e047e1e624cce0a2485e750063112e834f85522@7143 fc29be9c-2cb0-420d-b520-73dbd18add6e

opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core