Namespace Fixes (#105)

This changes the logic for namespaces to hopefully be more portable
to other Python environments.

Signed-off-by: David Brown <dmlb2000@gmail.com>

pacifica/__init__.py

@@ -1,4 +1,7 @@
 #!/usr/bin/python
 # -*- coding: utf-8 -*-
 """Pacifica Namespace."""
-__import__('pkg_resources').declare_namespace(__name__)
+try:
+    __import__('pkg_resources').declare_namespace(__name__)
+except ImportError:
+    __path__ = __import__('pkgutil').extend_path(__path__, __name__)