relax SVN archive

Python 3 - converted some print statements to function calls in the ScientificPython modules.

Python 3 - Fix for an os.chmod() call by using the stat module rather than the number 0775.

The number 0755 is no longer valid in Python 3.

Python 3 - a pile of relative path fixes for many relax modules.

Python 3 - removed the use of the types module from generic_fns.sequence.

The relax arg_check module is now being used instead.

Python 3 preparations - removed all of the string module functions which no longer exist in Python 3.

These functions are part of the strings themselves now.

Improvements for the relax test suite synopsis for when the wxPython module is missing or broken.

This is simply a printout improvement.

Fix for bug #20210 (https://gna.org/bugs/?20210) - relax now runs again without having wxPython installed.

Python 3 preparations - removal of some unneeded xrange() calls.

Python 3 preparations - the data package now really does use the absolute path for its module imports.

Python 3 preparations - the data package now uses absolute imports for all its modules.