documentation headings

[twynb]

Sphinx' docs contain links that point to specific headings in the files they link to. These links work after #117 , but don't lead to the actual heading in the link tag because the headings have further formatting in them.

Classes have an additional "*class* " before the actual class name the link tries to point to, functions have their parameters in the heading, which the link doesn't include.

For example, the generated backend_modules.md points to backend_modules_api_service#backend.modules.api_service.ApiService, the actual heading it tries to point to is formatted as *class* backend.modules.api_service.ApiService though.

Functions have a similar issue. backend_modules.md points to backend_modules_api_service#backend.modules.api_service.submit_to_services, the actual heading is backend.modules.api_service.submit_to_services(file_name, metadata)