[Distutils] setuptools, how to read metadata programatically?

[Jorge Vargas]

hi

I'm building a plugin manager on top of setuptools and I'll like to
know how could I read the  package metadata if I got it's EntryPoint.

basically what I need is get the author, version,etc. I found a
pkg_resources.EggMetadata but i'm not sure how to instantiate it
because I don't know what a "importer" means in this context.