moving Barclamp specific docs from general wiki
rename bc-template-foo.schema to attributes.schema

Add roles section to template deployments
Merge pull request #73 from VictorLowther/pull-req-master-9bdf40d9e246f0feb72ee603555057fa7d132fd9

https://github.com/crowbar/barclamp-glance/pull/73

Merged by devtool for VictorLowther
Merge pull request #72 from simonjj/pull-req-master-a11c5f6a401c4ce6f1ef707ae2301fb7c46e1d5e

https://github.com/crowbar/barclamp-glance/pull/72

Merged by devtool for VictorLowther
Update and rename README.txt to README.md