added license informations

Author: notandy

README.md

@@ -21,3 +21,11 @@ following in your *python_keyring/keyringrc.cfg* config:
 [backend]
 default-keyring=pass.Keyring
 ```
+
+License
+-------
+
+The keyring library is licensed under both the
+[MIT](http://opensource.org/licenses/MIT) license 
+and the [PSF](https://docs.python.org/2/license.html) license.
+

setup.py

@@ -4,12 +4,13 @@
 
 setup(
     name='pass_python_keyring',
-    version='1.0',
+    version='1.1',
     description=u"pass backend for python keyring lib",
     long_description=open('README.md').read(),
     url='http://github.com/notandy/pass_python_keyring',
     author='Andrew Karpow',
     author_email='andy@ndyk.de',
+    license='PSF and MIT',
     keywords=['pass', 'password', 'keyring'],
     py_modules=['pass'],
     classifiers=[