add a setup.py to allow to install with pip install -e

setup.py

@@ -0,0 +1,24 @@
+#!/usr/bin/env python
+from setuptools import setup
+from setuptools import find_packages
+
+version = '1.3.6'
+
+setup(name='youtube-dl',
+      version=version,
+      description="YouTube downloader",
+      long_description="""\
+**youtube-dl** is a small command-line program to download videos from
+YouTube.com and a few more sites. It requires the Python interpreter, version
+2.x (x being at least 6), and it is not platform specific. It should work in
+your Unix box, in Windows or in Mac OS X. It is released to the public domain,
+which means you can modify it, redistribute it or use it however you like.
+""",
+      packages=find_packages(exclude=['test']),
+      include_package_data=True,
+      zip_safe=False,
+      entry_points="""
+      [console_scripts]
+      youtube-dl = youtube_dl:main
+      """,
+      )