Handle media types with parameters

Some media types included in the "Accept" header include parameters. These
media type parameters are distinct from "q" and any other "accept-param", and
are listed before "q". With this patch these parameters don't cause errors.
(See sections 3.7 and 14.1 of RFC2616 for more information.)
Handle media types with parameters

Some media types included in the "Accept" header include parameters. These
media type parameters are distinct from "q" and any other "accept-param", and
are listed before "q". With this patch these parameters don't cause errors.
(See sections 3.7 and 14.1 of RFC2616 for more information.)
Merge branch 'mediatypeparameters' of github.com:jessaustin/werkzeug into mediatypeparameters

Conflicts:
	werkzeug/http.py
merge with changed test
verbose _accept_re, as requested
Add changelog
Merge branch 'mediatypeparameters'

Fix #205