docs(*): more cheatsheet docs

modules/angular2/docs/cheatsheet/lifecycle hooks.md

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+@cheatsheetSection
+Directive and component change detection and lifecycle hooks
+@cheatsheetIndex 6
+@description
+(implemented as class methods)
+
+@cheatsheetItem
+`constructor(myService: MyService, ...) { ... }`|`constructor(myService: MyService, ...)`
+The class constructor is called before any other lifecycle hook. Use it to inject dependencies, but avoid any serious work here.
+
+
+@cheatsheetItem
+`onChanges(changeRecord) { ... }`|`onChanges(changeRecord)`
+Called after every change to input properties and before processing content or child views.
+
+
+@cheatsheetItem
+`onInit() { ... }`|`onInit()`
+Called after the constructor, initializing input properties, and the first call to onChanges.
+
+
+@cheatsheetItem
+`doCheck() { ... }`|`doCheck()`
+Called every time that the input properties of a component or a directive are checked. Use it to extend change detection by performing a custom check.
+
+
+@cheatsheetItem
+`afterContentInit() { ... }`|`afterContentInit()`
+Called after onInit when the component's or directive's content has been initialized.
+
+
+@cheatsheetItem
+`afterContentChecked() { ... }`|`afterContentChecked()`
+Called after every check of the component's or directive's content.
+
+
+@cheatsheetItem
+`afterViewInit() { ... }`|`afterViewInit()`
+Called after onContentInit when the component's view has been initialized. Applies to components only.
+
+
+@cheatsheetItem
+`afterViewChecked() { ... }`|`afterViewChecked()`
+Called after every check of the component's view. Applies to components only.
+
+
+@cheatsheetItem
+`onDestroy() { ... }`|`onDestroy()`
+Called once, before the instance is destroyed.