Fixed syntax error in crowbar.yml

'@' is a reserved character in YAML, and needs to be quoted:

    http://yaml.org/spec/current.html#id2515596

otherwise rubygem-psych (as in ruby 1.9) complains about it and causes
barclamp_install.rb to exit.
Merge pull request #110 from aspiers/pull-req-master-9d9e0e065e56866b3d17ffa42bb595796a133c2a

Merged by devtool for cloudedge
Add barclamp configuration data for catalog function
Merge pull request #113 from waynepallen/pull-req-master-0d98bdb0444c68de93b59e8c9eb087a089b6ddaf

Merged by devtool for VictorLowther
Lift the barclamp templates out of the chef directory
Merge pull request #114 from VictorLowther/pull-req-master-3dc3a7577e4bd35be952fc693dcc5648ace9700f

Merged by devtool for aspiers
add .gitignore for barclamp repos with .lock, etc
Merge pull request #116 from waynepallen/pull-req-master-dbe7b4971969c1272385e2b2b0a56a5aa9f5d650

Add .gitignore file to barclamp repo; ignore Gemfile.lock files, etc. [4/4]
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