Update assignable predicate for Angular 0.9.4

This seems to have changed somewhat recent-ish. Without this, I am unable to get angular_node_bind to work with current Angular.dart
Merge pull request #1 from eee-c/patch-1

Update assignable predicate for Angular 0.9.4
bump version to 0.1.2
Use dev dependencies
Fixes for Angular 0.11.0