docs: add api stability indicators for @angular/common

modules/@angular/common/src/directives/core_directives.ts

@@ -46,6 +46,8 @@ import {NgPlural, NgPluralCase} from './ng_plural';
  *   ...
  * }
  * ```
+ *
+ * @stable
  */
 export const CORE_DIRECTIVES: Type[] = /*@ts2dart_const*/[
   NgClass,

modules/@angular/common/src/directives/ng_class.ts

@@ -72,6 +72,8 @@ import {StringMapWrapper, isListLikeIterable} from '../../src/facade/collection'
  *   }
  * }
  * ```
+ *
+ * @stable
  */
 @Directive({selector: '[ngClass]', inputs: ['rawClass: ngClass', 'initialClasses: class']})
 export class NgClass implements DoCheck, OnDestroy {

modules/@angular/common/src/directives/ng_for.ts

@@ -76,6 +76,8 @@ export class NgForRow {
  *
  * See a [live demo](http://plnkr.co/edit/KVuXxDp0qinGDyo307QW?p=preview) for a more detailed
  * example.
+ *
+ * @stable
  */
 @Directive({selector: '[ngFor][ngForOf]', inputs: ['ngForTrackBy', 'ngForOf', 'ngForTemplate']})
 export class NgFor implements DoCheck {

modules/@angular/common/src/directives/ng_if.ts

@@ -22,6 +22,8 @@ import {isBlank} from '../../src/facade/lang';
  * - `<div *ngIf="condition">...</div>`
  * - `<div template="ngIf condition">...</div>`
  * - `<template [ngIf]="condition"><div>...</div></template>`
+ *
+ * @stable
  */
 @Directive({selector: '[ngIf]', inputs: ['ngIf']})
 export class NgIf {

modules/@angular/common/src/directives/ng_plural.ts

@@ -15,6 +15,9 @@ import {SwitchView} from './ng_switch';
 
 const _CATEGORY_DEFAULT = 'other';
 
+/**
+ * @experimental
+ */
 export abstract class NgLocalization { abstract getPluralCategory(value: any): string; }
 
 /**
@@ -71,6 +74,7 @@ export abstract class NgLocalization { abstract getPluralCategory(value: any): s
  * }
  *
  * ```
+ * @experimental
  */
 
 @Directive({selector: '[ngPluralCase]'})
@@ -84,6 +88,9 @@ export class NgPluralCase {
 }
 
 
+/**
+ * @experimental
+ */
 @Directive({selector: '[ngPlural]'})
 export class NgPlural implements AfterContentInit {
   private _switchValue: number;

modules/@angular/common/src/directives/ng_style.ts

@@ -59,6 +59,8 @@ import {isPresent, isBlank} from '../../src/facade/lang';
  *
  * In this example the `font-style`, `font-size` and `font-weight` styles will be updated
  * based on the `style` property's value changes.
+ *
+ * @stable
  */
 @Directive({selector: '[ngStyle]', inputs: ['rawStyle: ngStyle']})
 export class NgStyle implements DoCheck {

modules/@angular/common/src/directives/ng_switch.ts

@@ -68,6 +68,8 @@ export class SwitchView {
  *
  * bootstrap(App).catch(err => console.error(err));
  * ```
+ *
+ * @experimental
  */
 @Directive({selector: '[ngSwitch]', inputs: ['ngSwitch']})
 export class NgSwitch {
@@ -166,6 +168,8 @@ export class NgSwitch {
  * If multiple match expression match the switch expression value, all of them are displayed.
  *
  * See {@link NgSwitch} for more details and example.
+ *
+ * @experimental
  */
 @Directive({selector: '[ngSwitchWhen]', inputs: ['ngSwitchWhen']})
 export class NgSwitchWhen {
@@ -193,6 +197,8 @@ export class NgSwitchWhen {
  * value.
  *
  * See {@link NgSwitch} for more details and example.
+ *
+ * @experimental
  */
 @Directive({selector: '[ngSwitchDefault]'})
 export class NgSwitchDefault {

modules/@angular/common/src/directives/ng_template_outlet.ts

@@ -6,6 +6,8 @@ import {isPresent} from '../../src/facade/lang';
  *
  * ### Syntax
  * - `<template [ngTemplateOutlet]="templateRefExpression"></template>`
+ *
+ * @experimental
  */
 @Directive({selector: '[ngTemplateOutlet]'})
 export class NgTemplateOutlet {