Discover/Tv has a duplicate sort_by

The documentation for Discover/Tv parameters with_genres and with_networks don't specify "OR" operation (with "|").. But other similar parameters do. Is this a mistake?

These parameters for Discover/Movie have conflicting descriptions: certification_country, certification, certification.lte.

Apparently, both certification and certification.lte require certification_country - but certification_country requires certification.lte. So according to this, it is not possible to specify certification.

They must be used in tandem, separately they are useless.

Re: the rest of the doc issues, I'll get them fixed up.

I assumed that I can do the following: https://github.com/LordMike/TMDbLib/blob/issue-95/TMDbLib/Objects/Discover/DiscoverMovie.cs#L52

Basically, I either set the Country and the specific certification, or the Country and a lte certification.

Documentation has been updated.

Cheers.