URLs are not normalised properly

[emanchado]

According to http://oauth.net/core/1.0a/#rfc.section.9.1.2, URLs must be normalised before using for signatures.

To fix it, it seems enough to change http://github.com/simplegeo/python-oauth2/blob/master/oauth2/__init__.py#LID292 to read:

self.normalized_url = urlparse.urlunparse((scheme.lower(), netloc.lower(), path, None, None, None))

Otherwise it will break when using URLs like HTTP://Example.com/foo/bar

[jaitaiwan]

@joestump might see if we can get #133 to include changes to close this?

[joestump]

@jaitaiwan this is a separate issue from #133, but related.

[jaitaiwan]

Sorry yes that's what I meant.