Goless

Fixes issue with previous release where goless would fail to install in Python3, due to pypi's gevent not being py3 compatible. setup.py now warns that you need to install gevent. Address 32, which is fallout from 31.

setup.py` will now install gevent if stackless cannot be imported. https://github.com/rgalanakis/goless/pull/31

- A "fix" for a gevent problem on Windows (`socket` must be imported!). [28](https://github.com/rgalanakis/goless/issues/28)
- Errors in the case of a deadlock will be more informative. For example, if the last greenlet/tasklet tries to do a blocking send or recv, a `DeadlockError` will be raised, instead of the underlying error being raised. [25](https://github.com/rgalanakis/goless/issues/25)
- goless now has a small exception hierarchy instead of exposing the underlying errors.
- Better PyPy stackless support. [29](https://github.com/rgalanakis/goless/issues/29)
- `goless.select` can be called with `(case1, case2, case3)`, etc., in addition to a list of cases (ie, `([case1, case2, case3])`). [22](https://github.com/rgalanakis/goless/issues/22)

Thanks to [Michael Az](https://github.com/MichaelAz) for several contributions to this release.

http://www.robg3d.com/2014/07/goless-0-7-released/

- Support for Python 3.3 and 3.4