implement group_names function
Merge branch 'JFreegman-groupnames'
Merge branch 'master' into debian/unstable
prepare for release

Signed-off-by: Kill Your TV <killyourtv@i2pmail.org>
Merge branch 'debian/unstable' into ubuntu/trusty
prepare for release

Signed-off-by: Kill Your TV <killyourtv@i2pmail.org>