v0.6.15

• Merge pull request #279 from mandragorn/form-model (4d20ea1)
• Allow aliasing of mappings w/o pull or push methods (dc29ee2)
• Merge pull request #277 from mandragorn/behavior-events (e58d174)
• Fixing timing issue with list view tests (3fdb9d3)
• Adding prepare() to Behavior. (ad3f610)
• Merge pull request #278 from mandragorn/events (ead4f21)
• Allow events hash to be modified in the initialize of the behavior. (051a406)
• Updating docs and bundle after release. (d98f8de)