Fixes bug in FirebaseArray's setting of $priority during remote updates
Fixes priority.spec.js e2e, removes sleep
Minor updates to priority e2e test
Fix failing unit tests ($priority related)
Merge branch 'release_0.8_prifix' of github.com:firebase/angularFire into release_0.8_prifix
Merged with release_0.8 branch
Merge pull request #361 from firebase/release_0.8_prifix

Fixes bug in FirebaseArray's setting of $priority during remote updates