[development] module categories

[Karoly Negyesi]

>> 2) contributed by core developers

For example, I am a core developer, and by now, you can say I am one of  
the seniors. Does that mean anything about the code blurbs I commit to  
contributions? Nothing. I barely have time to maintain them.

And who's a "core developer"? Core maintainer is a category which is  
clearly defined, it's listed in MAINTANERS.txt but in so far we asked for  
no "core developer certificate" from anyone who took the effort to submit  
a core patch :)

Regards

NK