message: docs(Input): update docs to clarify how to acheive validation using ngModel
  ISSUES CLOSED:
diff: @@ -97,19 +97,28 @@ myControl: FormControl = new FormControl({value: null, disabled: true});
  ### Required
  -For input's not using a `FormControl`, set the `isRequired` input to `true`:
  +When using a `FormControl`, set the required validator on the control:
  +
  +```typescript
  +myControl = new FormControl(null, Validators.required);
  +```
  +
  +When using `ngModel`, validations are placed on the input as data-attributes (just like native HTML inputs):
  ```html
  <ts-input
  [formControl]="myForm.get('myControl')"
  - [isRequired]="true"
  + required
  ></ts-input>
  ```
  -When using a `FormControl`, set the required validator on the control:
  +If only the required asterisk is needed rather than valiation errors, the `isRequired` flag can be used:
  -```typescript
  -myControl = new FormControl(null, Validators.required);
  +```html
  +<ts-input
  + [formControl]="myForm.get('myControl')"
  + [isRequired]="true"
  +></ts-input>
  ```
  