Allow slashes in the final parameter in the path if it's name begins with a '+', as per the Discovery format.
Merge remote-tracking branch 'upstream/master' into wildcard-path-parameters
Rename 'wildcard' path parameters to Reserved Expansion path parameters, since that's the actual term of art.
Merge pull request #254 from dgresham/wildcard-path-parameters

Allow slashes in the final parameter in the path if it's name begins with a '+'