Allow simulator playback rate to be optional specified at runtime

[akhenry]

Optional command line parameter for specifying the simulator playback rate.

• Adds a dependency to the builtin argparse package.
• Adds new makefile targets for launching simulator at 10Hz in automated testing.

To Do:

• [ ] Resolve merge conflicts

[ozyx]

39 is the same code but rebased since the changes to the Makefile, etc. So this one can be closed