Django-ssh-deployer

* `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.

* Refactored to prepare code and virtualenvs on all nodes, then change the symlinks on a second pass through. This drastically cuts down the amount of potential time the code is out of sync across nodes.
* Migrations are only run on the first node, run before the symlinks are changed, again minimize the time code and database are out of sync.
* Ensure the base directories for `code_path` and `virtualenvpath` exist or can be created by the `deploy_user`.

* Initial release