Vocabulary changes

- die was dropped, we use entry instead.  die::T_ATTR was dropped
  without replacement.  elem::T_ABBREV_UNIT was changed to entry.

- elem::T_ASET was changed to range.  address::T_ASET was changed to
  elem.  relem::T_ASET was added.  The reason for this is that elem,
  relem and length should behave as with T_SEQ, i.e. this should hold:
  (length == [elem] length).  But previously elem iterated chunks, not
  addresses.
Initialize locale in main
Flush some documentation edits