relax SVN archive

Python 3 preparation - all raising of RelaxErrors is now Python 2.4+ compatible.

Python 3 preparations - error handling is now Python 2 and 3 compatible in the relax_io module.

Python 3 preparations - converted the relax prompt/script interpreter to be Python 2 and 3 compatible.

Python 3 preparations - removed the use of the types.ClassType object.

Python 3 preparations - compatibility for both the Python 2 cPickle and Python 3 pickle modules.

Python 3 preparations - all usage of string.split() and string.strip() has been eliminated.

Removed the completely unused gui.components.conversion module.

Removed an unused import (which was breaking relax in Python 3).

Python 3 preparations - all os.popen3() instances in relax have been replaced by the subprocess module.

Python 3 preparations - eliminated the use of the os.popen3 function from the info module.