tox: Bump MySQL-Python version
tox: Refactor configuration
green.profile: accumulate results between runs; Thanks to Zhang Hua

https://bitbucket.org/eventlet/eventlet/issue/162/eventletgreenprofile-can-not-accumulate
queue: Make join not wait if there are no unfinished tasks

This fixes GitHub issue #54
support: bundle six 1.5.2

https://bitbucket.org/gutworth/six
http://pythonhosted.org/six/
python3 compat fixes

https://github.com/eventlet/eventlet/pull/59
travis: Build with Python 3.3
travis: Build with PyPy
travis: Fix "Invocation failed" when building with PyPy

Example: https://travis-ci.org/jstasiak/eventlet/jobs/22062267
pypy compat: Implement SocketDuckForFd's drop/reuse
pypy compat: Fix kqueue hub

PyPy (at least 2.2.x) raises IOError instead of OSError
tests: Make greenthread tests clean after themselves
pypy compat: Fix ssl wrap_socket test

Used to fail with "error: [Errno 9] Bad file descriptor"
pypy compat: Fix various tests
pypy compat: Fix greenio test_del_closes_socket test
pypy compat: Fix greenio tests
pypy compat: Fix refcount tests
travis: Run tox in verbose mode
travis: Print tox and pip logs in case of failure
travis: Upgrade dependencies