fix(select): remove processValue call from SelectDirective constructor. Update tests.
feat(ng-options): Add support for basic form of ng-options.
fix(ng-options): fix NoSuchMethodError that occurs when _listExpr doesn't immediately evaluate to a list.
Merge branch 'ng_options' of https://github.com/DrMarcII/angular.dart into ng_options

Conflicts:
	lib/directives/ng_options.dart