support fuzzy disc lookup by TOC

Signed-off-by: Johannes Dewender <github@JonnyJD.net>
return the result of collection operations

Signed-off-by: Alastair Porter <alastair@porter.net.nz>
rearrange discid query parameters

- Move discid toc to after includes (for api compatibility)
- Add cdstubs parameter (true by default, set to false to ignore stubs)
- Remove release type and status. They don't work on this query
- Add tests

Signed-off-by: Alastair Porter <alastair@porter.net.nz>
Merge branch 'fuzzy_toc'

Signed-off-by: Alastair Porter <alastair@porter.net.nz>
Merge branch 'master' of github.com:alastair/python-musicbrainz-ngs