Add '*' matcher for parameters

For get_type_provided:
'*' will be match any parameters of media-range in "accept" header.
If '*' matched, then '*' is replaced by the matching parameters.
If Accept header is missing and '*' using, then in media_type in parameters
will be '*' and reply content-type will be without any parameters.

For content_types_accepted:
'*' will be match any parameters in "content-type" header.
Merge branch 'param_all' of git://github.com/nevar/cowboy