Travis no longer supports python 2.5, will need to test it via test matrix
Test on python 3 and allow that to fail
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Merge pull request #70 from p-push/test-on-python-3

Test on python 3 and allow that to fail
Avoid treating exception as a tuple as this no longer works in python 3
Apparently "del m.handles" does not work in python 3
Handle the possibility of other tests failing in Python code called from C
Select lib directory matching current python version if there is more than one present