Changes in version 0.7:

A menu of buffers has been added.

A new chapter "Basic concepts" has been added to the manual.

A new argument parser taken from GNU ocrad has been added.

A buffer around "getch()" has been added to speed up pastes.

The efficiency of "append_record" has been improved for consecutive overwrites.

The efficiency of replaces has been improved, especially consecutive ones.

This release allows "reformat paragraph" to be interrupted with
Control-c, "F2" and "F3" to serve as their own abort keys, and space to
select items in menus.

A bug has been fixed that showed some special character sequences
incorrectly.
