Revert previous change affecting FA and FC files. FAC/FCC files.
* At revno 464, a change was introduced to output the constrained forces to the FA and FC files. This had unintended consequences for some analysis tools.
The change has been reverted, and the FC/FA files are now created as before. In addition, if constraints are used, new FCC/FAC files will be created with the constrained forces.
The vibra utility will default to use the FCC files if the GeometryConstraints block exists, and in any case the force-constants file to use can be specified with the Vibra.FC fdf option.
To support these changes, the write_forces subroutine has now the geometry step as an additional argument.
The writing of forces has been moved to its appropriate place in the write_subs modules.
* Some more cosmetic changes in the Vibra package.