Merge pull request #68 from nlivens/1.8.x

Added securityGroupId option to listSecurityGroupRules
Ceilometer Support
Incrementing version number to 1.8.1-CB-6
Merge pull request #69 from avibh/cloudband-1.8.x

Ceilometer Support
fixed accorind to jclouds code review
added support for samples filter
Incrementing version number to 1.8.1-CB-7
Merge pull request #70 from avibh/cloudband-1.8.x

Cloudband 1.8.x