Expanding the `.yaml` manifest capabilities

[mikolasstuchlik]

With introduction of the .yaml manifest, we have the opportunity to reduce the number of gir2swift files in each repository.

I would like to see following files being part of the .yaml manifest:

• .blacklist
• .module
• .override
• .preamble
• .verbatim
• .whitelist

What is your opinion on the issue. Is this desirable, and if so, are there any issues that would need to be solved?

[rhx]

I don't mind having this as part of the .yaml manifest, but please keep the ability to use the existing files for backward compatibility.

[mikolasstuchlik]

Thanks. I will start the work after #19 is accepted :)