Add several commonly used packages to the set that's built in prod.
Add several commonly used packages to the set that's built in prod.

I've added generic-lens by special request.  I also went through the
first few pages of https://hackage.haskell.org/packages/top and added
anything that looked promising.  (That ranking seems very flawed,
though.  Perhaps there's a better notion of package importance.)

Fixes #1347
Relevant to #79

google/codeworld,google/codeworld,google/codeworld