Updated README with copright/license

Change-Id: Ibbb4dbca30e03e88bbd3d47d73df2ad4d0cfb1fc
Release 3.1.1

Updated Modulefile and README.md for 3.1.1 release.

Change-Id: I3afd0df190e6e8a44fe3b3e9c2ab379eef5b955e
Merge branch 'havana' of https://github.com/gwdg/puppet-ceilometer into havana