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import of the new testInstallation module and a command to run the tests.

This way, we only have one place where we need to maintain this code, yet the
current workflow of "run testInstallation.py" still works.

the 3rd and 4th columns, making it an invalid Amber inpcrd file (which the new
parser cannot handle).

simulateCharmm.py to use the latest force fields. This is what CHARMM does for
their own tutorials, so this is fine.

to prevent users from actually using them.

Add a test case and example for running with CHARMM files.