Fix + test
Merge pull request #744 from Shopify/Clear-model-errors-on-load

Errors are cleared when a model is loaded
Vendor batman. See PR #744 for changes made.
Fix race when multiple frame operations are occurring
Merge pull request #733 from Shopify/alfred_path_to_app

Fix Alfred pathToApp
Refactor model loading to create slightly less redundant instances
Merge pull request #746 from Shopify/fix_dispatcher_race

Fix race when multiple frame operations are occurring
Remove unnecessary ?
Use mixin over updateAttributes
Merge pull request #748 from Shopify/refactor_create_from_json

Refactor model loading to create slightly fewer redundant instances
Compile
Add missing documentation/tests for Batman helpers