Make license database public

[To1ne]

At GitLab we've been working to integrate this package in our codebase (with the kind help of @g4s8).

But to use this package to it's full extent, it would be nice if it would expose more info about the detected license.

The info we'd need:

• name
• nickname (not sure how this differs from the name, is it the SPDX name?)
• url to the license

I don't think this require a change in the API, but we'd need outside access to licensedb/internal. But I'm happy to hear your thought on that.

[To1ne]

Closed by #23.