Open and execute the PyMOL macro file.
file: The name of the PyMOL macro file.
dir: The directory name.
This user function is for opening and running a PyMOL macro located within a text file.
To execute the macro file `s2.pml' located in the directory `pymol', type:
[numbers=none] relax> pymol.macro_run(file='s2.pml')
[numbers=none] relax> pymol.macro_run(file='s2.pml', dir='pymol')