Changes in version 1.7:

Show the "Try 'ed --help' for more information." message if a bad option
is given in the command line.

Quote characters in messages have been changed as advised by GNU Coding
Standards.

The description of address offsets in the manual and a link to the Bash
manual have been fixed.

Configure option "--datadir" has been renamed to "--datarootdir" to
follow GNU Standards.

The target "install-bin" has been added to the Makefile.
