New in 0.7:
* Reliable tty control, as described by the ttyctl_t enum, is now implemented.

New in 0.6:
* The ostream_t operation 'flush' now takes an additional argument, of type
  ostream_flush_scope_t.
* New functions:
       TYPE                               FUNCTION
  styled_ostream_t          styled_ostream_flush_to_current_style
  term_ostream_t            term_ostream_flush_to_current_style
  html_ostream_t            html_ostream_flush_to_current_style

New in 0.5:

* The libtextstyle library can now be built and installed independently
  of GNU gettext.
