Fri Jul 24 13:12:40 EDT 2015

Data.hs from meta/dspm

It should be possible to build on the previous implementation now.  A
lot of the work is already done; though it needs some cleanup.

It seems the next thing to fix is structvar, which generally is a
problem of commutation of representation and structuring.

I believe the implementation is only abot (,) which is enough for now.

A problem appears in StructVar which is a compiler internal.  Maybe it
can be removed and tucked away like the previous existential?

Let's remove Struct.hs as it introduces some seemingly badly
constructed type juggling..