Fix typo: packaing --> packaging

Author: jeffwidman

docs/managing_python_path.rst

@@ -60,7 +60,7 @@ This ``setup.py`` file is not sufficient to distribute your package to PyPI or
 more general packaging, but it should help you get started. Please refer to the
 `Python Packaging User Guide
 <http://python-packaging-user-guide.readthedocs.org/en/latest/tutorial.html#creating-your-own-project>`_
-for more information on packaing Python applications.`
+for more information on packaging Python applications.`
 
 To install the project afterwards::