Add scaffolding for bdist_pex

See pex-toolGH-99

pex/bdist_pex.py

@@ -0,0 +1,20 @@
+# Copyright 2014 Pants project contributors (see CONTRIBUTORS.md).
+# Licensed under the Apache License, Version 2.0 (see LICENSE).
+
+from __future__ import absolute_import, print_function
+
+from distutils.core import Command
+
+
+class bdist_pex(Command):
+    description = 'create a pex distribution'
+    user_options = []
+
+    def initialize_options(self):
+        pass
+
+    def finalize_options(self):
+        pass
+
+    def run(self):
+        print('This is where we would create a pex')

setup.py

@@ -55,5 +55,8 @@
     'console_scripts': [
       'pex = pex.bin.pex:main',
     ],
+    'distutils.commands': [
+      'bdist_pex = pex.bdist_pex:bdist_pex',
+    ],
   },
 )