Added a RelaxWarning printout to the dep_check module if wxPython 2.8 or less is encountered.
This follows from http://thread.gmane.org/gmane.science.nmr.relax.devel/7502. The warning text is simply written to STDERR as relax starts.
Authored by: bugman 2015-01-20
Parent: [r27240]
Child: [r27242]
