Use term "webhook" consistently
Pretty sure nothing is getting deleted
There's nothing JSON about this, really

... other than the types happen to be JSON-serializable...
Type markup consistency
Clarify return value of create_webhooks
Remove FUD about id key
Say something about webhook & capability URLs
Fix Sphinx raises markup
Merge branch 'master' into fix-model-interfaces
Clarify job of REST layer
Merge pull request #657 from rackerlabs/fix-model-interfaces

Fix IScalingGroup.create_webhooks