feat(core): support properties and events in addition to inputs and outputs to make transition easier

Closes #4482

modules/angular2/test/public_api_spec.ts

@@ -157,10 +157,12 @@ var NG_API = [
   'Component.bindings',
   'Component.changeDetection',
   'Component.outputs',
+  'Component.events',
   'Component.exportAs',
   'Component.host',
   'Component.moduleId',
   'Component.inputs',
+  'Component.properties',
   'Component.queries',
   'Component.selector',
   'Component.viewBindings',
@@ -168,10 +170,12 @@ var NG_API = [
   'ComponentMetadata.bindings',
   'ComponentMetadata.changeDetection',
   'ComponentMetadata.outputs',
+  'ComponentMetadata.events',
   'ComponentMetadata.exportAs',
   'ComponentMetadata.host',
   'ComponentMetadata.moduleId',
   'ComponentMetadata.inputs',
+  'ComponentMetadata.properties',
   'ComponentMetadata.queries',
   'ComponentMetadata.selector',
   'ComponentMetadata.viewBindings',
@@ -370,19 +374,23 @@ var NG_API = [
   'Directive',
   'Directive.bindings',
   'Directive.outputs',
+  'Directive.events',
   'Directive.exportAs',
   'Directive.host',
   'Directive.moduleId',
   'Directive.inputs',
+  'Directive.properties',
   'Directive.queries',
   'Directive.selector',
   'DirectiveMetadata',
   'DirectiveMetadata.bindings',
   'DirectiveMetadata.outputs',
+  'DirectiveMetadata.events',
   'DirectiveMetadata.exportAs',
   'DirectiveMetadata.host',
   'DirectiveMetadata.moduleId',
   'DirectiveMetadata.inputs',
+  'DirectiveMetadata.properties',
   'DirectiveMetadata.queries',
   'DirectiveMetadata.selector',
   'DirectiveResolver',