cmcat

[Matthew Fluet]

I was trying to port cmcat.sml to SML/NJ 110.36 (I want to add 
make mlton.cm  to my remote make sml because I usually just make sure that
a make nj-mlton succeeds and don't always remember to update mlton.cm).
Anyways, I don't think CM exports enough functionality anymore.

CM.names and CM.names' are gone.

The CM structure includes:

  val sources : {arch:string, os:string} option
                -> string
                   -> {class:string, derived:bool, file:string} list option

but, this list isn't topologically sorted.