Shifted the lib.software.grace module to lib.plotting.grace.
This follows from http://thread.gmane.org/gmane.science.nmr.relax.devel/7532 and http://thread.gmane.org/gmane.science.nmr.relax.devel/7536.
Authored by: bugman 2015-02-06
Parent: [r27592]
Child: [r27594]