relax SVN archive

Python 3 - removal of the use of the string.atoi and string.atof functions.

These have been depreciated since Python 2.0!! They have been replace by the int and float
functions.

Python 3 - a number of fixes for running the ScientificPython modules in relax on Python 2 and 3.

This includes relative imports, converting raise statements to function calls, removal of the use of
many string module functions which do not exist in Python 3, etc.

Python 3 - modified some except statements to be Python 2.4+ compatible in a ScientificPython module.

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The number 0755 is no longer valid in Python 3.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.