Relicense to include additional permission. Fixes #44.

LICENSE

@@ -616,6 +616,15 @@ an absolute waiver of all civil liability in connection with the
 Program, unless a warranty or assumption of liability accompanies a
 copy of the Program in return for a fee.
 
+  18. Additional Permission
+
+  If you modify the Program, and your modified version becomes subject
+to the requirement stated in AGPLv3, section 13, you may satisfy
+this requirement by providing access to the Corresponding Source of
+your modified version to each user that explicitly requests such
+Corresponding Source, no later than 15 days following the date on
+which such request was received
+
                      END OF TERMS AND CONDITIONS
 
             How to Apply These Terms to Your New Programs

setup.py

@@ -26,7 +26,7 @@ setup(name='tahrir',
       version='0.1.9',
       description='A pyramid app for issuing your own Open Badges',
       long_description=README,
-      license="AGPLv3+",
+      license="AGPLv3+ with additional permission",
       classifiers=[
         "Programming Language :: Python",
         "Framework :: Pyramid",