Add LICENSE file from rotp, bump version to 1.3.1 for PyPI

LICENSE

@@ -0,0 +1,21 @@
+Copyright (C) 2011 by Mark Percival <[email protected]>
+
+Python port copyright 2011 by Nathan Reynolds <[email protected]>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

MANIFEST.in

@@ -1,2 +1,3 @@
+include LICENSE
 include README.markdown
 include test.py

setup.py

@@ -3,7 +3,7 @@
 from distutils.core import setup
 
 setup(
-    version='1.3.0',
+    version='1.3.1',
     url='https://github.com/nathforge/pyotp',
     name='pyotp',
     description='https://github.com/nathforge/pyotp',