Externalized requirements

Author: poligarcia

Diff for: requirements.txt

@@ -0,0 +1 @@
+M2Crypto>=0.21.1

Diff for: setup.py

@@ -1,6 +1,7 @@
 from distutils.core import setup
 
 version = __import__('passbook').__version__
+install_requires = open('requirements.txt').readlines(),
 
 setup(
     name='Passbook',
@@ -15,9 +16,7 @@
 
     download_url='http://pypi.python.org/packages/source/P/Passbook/Passbook-%s.tar.gz' % version,
 
-    install_requires=[
-        "M2Crypto >= 0.21.1",
-    ],
+    install_requires=install_requires,
 
     classifiers = [
         'Development Status :: 3 - Alpha',