comments should now be indented properly in corner cases
  (at the end of statement lists, for instance)

- changed import decl. formatting as suggested by Russ (no "global"
  indentation of imports if there are renames present)

- better field list handling

- better documentation

R=rsc
DELTA=534  (324 added, 35 deleted, 175 changed)
OCL=35557
CL=35630