Redid the slot computation.  The initial slot assignments are now done using the same algorithm as the slot updates.  The slotdefs array is now sorted by slot offset and has an interned string object corresponding to the name added to each item.  More can be done but I need to commit this first as a working intermediate stage.
Redid the slot computation.  The initial slot assignments are now done
using the same algorithm as the slot updates.  The slotdefs array is
now sorted by slot offset and has an interned string object corresponding
to the name added to each item.  More can be done but I need to commit
this first as a working intermediate stage.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator