This patch fixes some issues with Python 2.6 compatability and using

SVN 1.6.
All tests using TestCase.assertIn(element, container) have been

rewritten to use TestCase.assertTrue(element in Container). All tests

using TestCase.assertRaises as a context manager have been rewritten

to not use a context manager.
The tests that operate on the output of svn diff have been modified

to have a decorator applied to them that will supply the correct hash

depending on the current version of SVN. This is required because SVN

prior to 1.7 will generate a different diff.
The aliases module has been updated to ensure that on pre Python 2.7.3

that the command is passed as a binary string and not a unicode string.

Support in shlex.split for unicode strings was added in Python

2.7.3.

Unit tests passed using all the following combinations:

Python 2.6, SVN 1.6
Python 2.6, SVN 1.8
Python 2.6, SVN 1.6
Python 2.6, SVN 1.8