relax SVN archive

svn+ssh://bugman@.../svn/relax/trunk

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r24755 | bugman | 2014-07-25 16:51:16 +0200 (Fri, 25 Jul 2014) | 3 lines

Deleted the ancient optimisation_testing.py script, as this no longer works and is of no use.
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r24756 | bugman | 2014-07-25 16:59:22 +0200 (Fri, 25 Jul 2014) | 3 lines

Some changes as identified by the Python 2 to 3 upgrade script /usr/bin/2to3.
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r24757 | bugman | 2014-07-25 17:12:32 +0200 (Fri, 25 Jul 2014) | 3 lines

Some Python 3 fixes as identified by the 2to3 script.
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