Remove Cloudstack root volume from list of attached volumes to backup.
Bump version to 1.1.6.
Update CHANGELOG.md for 1.1.6 release.
remove irc notifications in .travis.yml.
Merge pull request #14 from rightscale-cookbooks/st_14_16_acu182511_skip_root_vol_on_cloudstack_backup

Skip root vol on cloudstack backup