Django-ssh-deployer

* Add support for additional `.so` file patterns that may be installed with `pip` for SELinux.

* Add ability to run commands per-environment after the publish is complete. These will be the last thing run before migrations. This is handy for things like required `chmod` changes, or `curl` calls.

* SELinux is now supported. When a publish occurs, the proper security context is set for the published files and venv.

* Some documentation touch ups.

* `virtualenv` has been deprecated in favor of `venv`, which ships with Python 3.3+. If you need support for `virtualenv`, please use the latest release from the 0.2 family.
* To simplify, `virtualenv_path` is not longer supported as an option. The `venv` will be created at the root of the project.
* The setting `virtualenv_python_path`, which points to the Python executable to build the `venv`, has been renamed to `venv_python_path` for consistency.

* Fix a bug where a redundant symlink was being overwritten, creating unnecessary time where the database might be out of sync with code on nodes.
* Update long description with Markdown for the awesome new PyPI interface.