feat(core): desugar [()] to [prop] and (prop-change)

BREAKING CHANGE

Before

```
<cmp [(prop)]="field"> was desugared to <cmp [prop]="field" (prop)="field=$event">
```

After
```
<cmp [(prop)]="field"> is desugared to <cmp [prop]="field" (prop-change)="field=$event">
```

Closes #4658

modules/angular2/test/core/compiler/template_parser_spec.ts

@@ -282,7 +282,7 @@ export function main() {
                    ],
                    [
                      BoundEventAst,
-                     'prop',
+                     'propChange',
                      null,
                      'v = $event',
                      'TestComp > div:nth-child(0)[[(prop)]=v]'
@@ -305,7 +305,7 @@ export function main() {
                    ],
                    [
                      BoundEventAst,
-                     'prop',
+                     'propChange',
                      null,
                      'v = $event',
                      'TestComp > div:nth-child(0)[bindon-prop=v]'