Revert "fix whatis entry of README.pod"

This reverts commit 1b1e5f3ca5df2842ff83b05754551d2043109917.
Apparently according to Debian's specs README files should have
a NAME section - which was fixed in the previous commit. See
https://rt.cpan.org/Ticket/Display.html?id=90101

However both http://metacpan.org and http://search.cpan.org
will now only display the README instead of the module's POD.
See https://rt.cpan.org/Ticket/Display.html?id=90101
https://github.com/CPAN-API/metacpan-web/issues/1041

So for now I'm reverting this commit; and Debian maybe can carry
the 'fix' to the readme as a downstream patch.
Updated changelog, upped version number to 4.027.