Remove dependency on 'python-simplejson'

- Remove "Requires" and "BuildRequires" on python-simplejson for
  Fedora/RHEL6+

Bug: 1054622
Change-Id: Iaeb99fc493e7e32596a30c90110cfe31ff362ad8
Use 'basestring' instead of str/unicode

Bug: 1054622
IPv6 support

This patch allows Beah to function in an IPv6 only environment in
addition to IPv4 only and IPv4/IPv6 environment.

Bug: 810893
Change-Id: Icfb4d7ce665c0aeace8479563464df59e8a4d142
Admin guide: Documentation for IPv6 functionality

Bug: 810893
Change-Id: Id52e8fb669df0686c357857ed9d3ac98fa7c2ebd
Release notes for new major release - 0.7.0

Also, bump version string.
Automatic commit of package [beah] release [0.7-1].