Pulling in changes from darcs patch:

Pulling in changes from darcs patch:
Tue Jun 12 17:51:57 EDT 2007  Nathan Bird <nathan@acceleration.net>
  * refactorng choose-database-for-instance method out
  this function encapsulates the logic about which database connection to use
  and is called by most of the update-*-from-* in the oodml functions.

  Also refactored update-record-from-instance to call update-record-from-slots.

WARNING: This patch may not represent a stable point as i was cutting and pasting to apply.