House Cleaning

removed viscore_tests because it no longer tests anything useful.
Evaluation Capability, Figure Keypress Functions

The control panel is now capable of accepting expressions to evaluate if
a certain option is selected.

You can now also control the angle of the robot arm and the angular
velocity on the visualizer using the left/right arrows and up/down
arrows respectively.
Simulink Plugin

Added a plugin allowing for a simulink object to send updates to the
casting simulation.