improved README.md
improved README.md

bnagit/puppet-hipchat,voxpupuli/puppet-report_hipchat,james-powis/puppet-hipchat,jamtur01/puppet-hipchat,james-powis/puppet-hipchat,bnagit/puppet-hipchat,jamtur01/puppet-hipchat,voxpupuli/puppet-report_hipchat