[Yhc] darcs patch: Implement IdSupply for real (and 5 more)

4 Oct 2006

      Tue Oct  3 13:25:52 EDT 2006  Samuel Bronson 
  * Implement IdSupply for real

Tue Oct  3 14:15:25 EDT 2006  Samuel Bronson 
  * Begin turning ImportState into a record type...

Tue Oct  3 16:44:31 EDT 2006  Samuel Bronson 
  * Refactor ImportState and IExtract some

Tue Oct  3 17:07:19 EDT 2006  Samuel Bronson 
  * Refactor IExtract.importData to use the pseudo-monad

Tue Oct  3 18:52:05 EDT 2006  Samuel Bronson 
  * More refactoring in IExtract

Tue Oct  3 19:53:00 EDT 2006  Samuel Bronson 
  * Refactor IExtract.importField