chore(release): bump versions. verify package versions.

Merge pull request angular#1018 from jamesdaniels/rc1

chore(release): Changelog

chore(release): Release RC0

chore(release): Release beta.8 (angular#826)

chore(release): Release beta.7

chore(api): Remove old database and auth providers

chore(release): release beta.6

docs(CHANGELOG): add breaking change note about packaging

Update CHANGELOG.md

docs(Changelog): update Changelog to beta.2