Merge pull request #16 from graingert/master

drop POLICY_URI setting and view fixes #13
Change link to point to the W3C wiki
Rename "allow" to "default-src" (3.2.1)
Mention that "javascript:" URIs are disabled by default (3.2.13)
Rename "inline-scripts" option to "disable-xss-protection" (3.2.13)
Move build_policy to utils, clean up __init__.
Update for CSP "Last Call Working Draft":
http://www.w3.org/TR/2012/WD-CSP-20120710/
Fix-up fabfile copied from Waffle.
Stop catching all exceptions. Fix #15.

Also use request.body if defined, else request.raw_post_data.
Changes blocked_uri field to a models.CharField.

The blocked-uri parameter from CSP reports does not have to be a fully
qualified URL.
When using Firefox 16 some fields from JSON are missing in report model and `create` fails. See #24

Added check so that only existing fields in the model are passed to
`create` to prevent any future similar errors.
inform setup.py of templates it needs to copy
Send X-WebKit-CSP(-Report-Only) to WebKit. Fix #8.

- Add tests.
- Upgrade requirements to Django 1.4.
Add TravisCI file.
Optional trailing slash. Fix #23.
WIP Docs.
Way more doc updates.
Streamline some code.
Add South migration.
Add MANIFEST.in.