Need the ability to filter DotNet namespaces from ApiMark documentation

[Malcolmnixon]

Some tools like Antlr produce massive amounts of "public" generated code that gets picked up by ApiMark and pollutes the generated documentation.

The CLI and MSBuild jobs need a way to exclude multiple types and namespaces, (possibly using wildcards) from ApiMark document generation.

Excluded types and namespaces should not show up in indexes.