fix(scope): improve error msg on unstable model
fix(binding): call attach when attribute is not specified
chore(style): formating
fixup! fix(binding): call attach when attribute is not specified
fix(scope): createChild now requires context
chore(mustach): revert incorect watch/observ optimization
feat(animate): More tests, async tests, and mocks.
Merge remote-tracking branch 'misko/change-detector' into animate
feat(animate): Fix ng_switch tests.