- Use bulk statements for containers

  Should be fairly straightforward since container tables are simple. For
  smart containers, can we group all the DELETEs, UPDATEs, and INSERTs?

- Ability to define custom indexes on container values

  Currently we only support id and index but there is no good reason (other
  than complexity) why we shouldn't support values as well. Will need to
  support composite values.

  See email from marcos.glez@gmail.com/22-Aug-2014.