Synchronised the code for handling Molmol and PyMOL.
The Molmol code is now very similar to that of PyMOL, using subprocess.Popen rather than os.popen. There is now a Molmol execution object that is used by the molmol user functions.
Authored by: bugman 2011-08-10
Parent: [r14306]
Child: [r14308]
