fix(ng_model): Disable a test that did not pass in content_shell
chore(expression_extractor): default package-root when not provided.
fix(scope): Also check for UnimplementedError when reflecting on source
chore(repo): git pre-commit hook script
WIP: ChangeDetector API proposal
WIP: basic dirty checking implementation
WIP: checkpoint getter is a function
WIP: docs/ AST
WIP
WIP
WIP: LinkedList0
WIP
WIP: correct karma-snapshoot.sh
WIP: green
WIP
WIP cleanup
WIP
WIP
WIP
WIP