moving Barclamp specific doc from general Crowbar Wiki
rename bc-template-foo.schema to attributes.schema

Add roles section to template deployments
Merge pull request #127 from VictorLowther/pull-req-master-9bdf40d9e246f0feb72ee603555057fa7d132fd9

https://github.com/crowbar/barclamp-nova/pull/127

Merged by devtool for VictorLowther
Merge pull request #125 from simonjj/pull-req-master-a11c5f6a401c4ce6f1ef707ae2301fb7c46e1d5e

https://github.com/crowbar/barclamp-nova/pull/125

Merged by devtool for VictorLowther