feat(core): @Attribute annotation

Closes #1091
Fixes #622

modules/angular2/src/core/compiler/pipeline/compile_element.js

@@ -22,6 +22,7 @@ export class CompileElement {
   textNodeBindings:Map;
   propertyBindings:Map;
   eventBindings:Map;
+  attributes:Map;
 
   /// Store directive name to template name mapping.
   /// Directive name is what the directive exports the variable as
@@ -144,6 +145,13 @@ export class CompileElement {
     MapWrapper.set(this.eventBindings, eventName, expression);
   }
 
+  addAttribute(attributeName:string, attributeValue:string) {
+    if (isBlank(this.attributes)) {
+      this.attributes = MapWrapper.create();
+    }
+    MapWrapper.set(this.attributes, attributeName, attributeValue);
+  }
+
   addDirective(directive:DirectiveMetadata) {
     var annotation = directive.annotation;
     this._allDirectives = null;

modules/angular2/src/core/compiler/pipeline/property_binding_parser.js

@@ -72,6 +72,8 @@ export class PropertyBindingParser extends CompileStep {
         var ast = this._parseInterpolation(attrValue, desc);
         if (isPresent(ast)) {
           current.addPropertyBinding(attrName, ast);
+        } else {
+          current.addAttribute(attrName, attrValue);
         }
       }
     });

modules/angular2/src/core/compiler/pipeline/proto_element_injector_builder.js

@@ -59,6 +59,7 @@ export class ProtoElementInjectorBuilder extends CompileStep {
           current.inheritedProtoElementInjector.exportImplicitName = exportImplicitName;
         }
       }
+      current.inheritedProtoElementInjector.attributes = current.attributes;
 
     } else {
       current.inheritedProtoElementInjector = parentProtoElementInjector;