SQUASHME
FIXFOR: Refactoring of init/clean editor buffer.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
FIXFOR: Use GPtrArray to store editor buffers.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
FIXFOR: Refactoring editor buffer functions of get bytes/symbols.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
FIXFOR: (get_paragraph): refactoring.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>