Fix typos, complete license declaration.

Author: rouilj

doc/announcement.txt

@@ -32,7 +32,7 @@ Among the notable improvements from the 2.1.0 release are:
 - Word size for Roundup's full text search increased to 50.
 
 - CORS support for the REST interface allowing Roundup to
-  be use by third party services. Includes ability to
+  be used by third party services. Includes ability to
   list valid Origins in CSRF checks.
 
 - Dockerfile support. Docker-compose for a mysql based
@@ -73,7 +73,7 @@ Among the notable improvements from the 2.1.0 release are:
 
 The file CHANGES.txt has a detailed list of feature additions and
 bug fixes (50) for each release. The most recent changes from
-there are at the end of this announcement.  Also see the
+there are at the end of this announcement. Also see the
 information in doc/upgrading.txt.
 
 If you find bugs, please report them to issues AT roundup-tracker.org

setup.py

@@ -197,7 +197,9 @@ def main():
                        'Intended Audience :: End Users/Desktop',
                        'Intended Audience :: Developers',
                        'Intended Audience :: System Administrators',
+                       'License :: OSI Approved',
                        'License :: OSI Approved :: MIT License',
+                       'License :: OSI Approved :: Zope Public License'
                        'Operating System :: MacOS :: MacOS X',
                        'Operating System :: Microsoft :: Windows',
                        'Operating System :: POSIX',