docs(*): add initial cheatsheet tags

modules/angular2/src/common/directives/core_directives.ts

@@ -44,6 +44,29 @@ import {NgSwitch, NgSwitchWhen, NgSwitchDefault} from './ng_switch';
  *   ...
  * }
  * ```
+
+ * @cheatsheetSection
+ *       Built-in directives
+ *       `import {NgIf, ...} from 'angular2/angular2';`
+ * @cheatsheetItem
+ *       <section *ng-if="showSection">
+ *       Removes or recreates a portion of the DOM tree based on the showSection expression.
+ *       *ng-if
+ * @cheatsheetItem
+ *       <li *ng-for="#item of list">
+ *       Turns the li element and its contents into a template, and uses that to instantiate a view for each item in list.
+ *       '*ng-for'
+ * @cheatsheetItem
+ *       <div [ng-switch]="conditionExpression">\n  <template [ng-switch-when]="case1Exp">...</template>\n  <template ng-switch-when="case2LiteralString">...</template>\n  <template ng-switch-default>...</template>\n</div>
+ *       Conditionally swaps the contents of the div by selecting one of the embedded templates based on the current value of conditionExpression.
+ *       [ng-switch]
+ *       [ng-switch-when]
+ *       ng-switch-when
+ *       ng-switch-default
+ * @cheatsheetItem
+ *       <div [ng-class]="{active: isActive, disabled: isDisabled}">
+ *       Binds the presence of css classes on the element to the truthiness of the associated map values. The right-hand side expression should return {class-name: true/false} map.
+ *       [ng-class]
  */
 export const CORE_DIRECTIVES: Type[] =
     CONST_EXPR([NgClass, NgFor, NgIf, NgStyle, NgSwitch, NgSwitchWhen, NgSwitchDefault]);

modules/angular2/src/core/application.ts

@@ -18,6 +18,61 @@ export {
 } from './application_ref';
 
 /// See [commonBootstrap] for detailed documentation.
+/**
+ * @cheatsheetSection
+ *          Bootstrapping
+ *          `import {bootstrap} from 'angular2/angular2';`
+ * @cheatsheetItem
+ *          <input [value]="firstName">
+ *          Binds property value to the result of expression firstName.
+ *          [value]
+ * @cheatsheetItem
+ *          <div [attr.role]="myAriaRole">
+ *          Binds attribute role to the result of expression myAriaRole.
+ *          [attr.role]
+ * @cheatsheetItem
+ *          <div [class.extra-sparkle]="isDelightful">
+ *          Binds the presence of the css class extra-sparkle on the element to the truthiness of the expression isDelightful.
+ *          [class.extra-sparkle]
+ * @cheatsheetItem
+ *          <div [style.width.px]="mySize">
+ *          Binds style property width to the result of expression mySize in pixels. Units are optional.
+ *          [style.width.px]
+ * @cheatsheetItem
+ *          <button (click)="readRainbow($event)">
+ *          Calls method readRainbow when a click event is triggered on this button element (or its children) and passes in the event object.
+ *          (click)
+ * @cheatsheetItem
+ *          <div title="Hello {{ponyName}}">
+ *          Binds a property to an interpolated string, e.g. "Hello Seabiscuit". Equivalent to: <div [title]="'Hello' + ponyName">
+ *          {{ponyName}}
+ * @cheatsheetItem
+ *          <p>Hello {{ponyName}}</p>
+ *          Binds text content to an interpolated string, e.g. "Hello Seabiscuit".
+ *          {{ponyName}}
+ * @cheatsheetItem
+ *          <my-cmp [(title)]="name">
+ *          Sets up two-way data binding. Equivalent to:\n<my-cmp [title]="name" (title-change)="name=$event">
+ *          [(title)]
+ * @cheatsheetItem
+ *          <video #movieplayer ...>\n<button (click)="movieplayer.play()" >
+ *          Creates a local variable movieplayer that provides access to the video element instance in data- and event-binding expressions in the current template.
+ *           #movieplayer
+ *           (click)
+ * @cheatsheetItem
+ *          <p *my-unless="myExpression">...</p>
+ *          The * symbol means that the current element will be turned into an embedded template. Equivalent to:\n<template [my-unless]="myExpression"><p>...</p></template>
+ *          *my-unless
+ * @cheatsheetItem
+ *          <p>Card No.: {{cardNumber myCreditCardNumberFormatter}}</p>
+ *          Transforms the current value of expression cardNumber via pipe called creditCardNumberFormatter.
+ *          {{cardNumber myCreditCardNumberFormatter}}
+ * @cheatsheetItem
+ *          <p>Employer: {{employer?.companyName}}</p>
+ *          The Elvis operator (?) means that the employer field is optional and if undefined, the rest of the expression should be ignored.
+ *          {{employer?.companyName}}
+ *
+ */
 export function bootstrap(
     appComponentType: /*Type*/ any,
     appProviders: Array<Type | Provider | any[]> = null): Promise<ComponentRef> {