consistent capitalization of acronym modules

[StefanKarpinski]

See this comment:

We've been title casing things like Blas and Lapack so it seems like for consistency we might want to do the same with Glpk, although we could also just uppercase all of them. Gets kind of loud though. Of course there's also Base.PCRE.

[johnmyleswhite]

I would personally prefer uppercasing all acronyms.

[StefanKarpinski]

I can get on board with that.