This commit was manufactured by cvs2svn to create branch 'new-templateless'.
added a new NPT integrator, NPTxyz. It scales the x, y, and z direction sepeartely. no box skew allowed.
Converted NPTf to work with the NPT base class. Removed NPTfm and NPTim from cvs
added NPT base class. NPTi is up to date. NPTf is not.
Added Z constraint.
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