first round of draft/scheduled post code.  added DwBaseObj/UserDbObj/

Fu, you wanted bugs 29 (draft posts) and 51 (scheduled posts) back, right?

This has drafts more or less working (probably needs some more testing without javascript, especially on
older browsers, plus some better error handling).  Scheduled posts also work, but only in the simplest way;
we don't even check for the dates being in the future, there's no notification for successful or unsuccessful
posts.  That probably needs the most work.