fixing some errors with templates functions

Author: hansl

src/components/button/button.ts

@@ -19,7 +19,7 @@ import {
             'button[md-fab], button[md-mini-fab]',
   inputs: ['color'],
   host: {
-    '[class.md-button-focus]': 'isKeyboardFocused',
+    '[class.md-button-focus]': '_isKeyboardFocused',
     '(mousedown)': '_setMousedown()',
     '(focus)': '_setKeyboardFocus()',
     '(blur)': '_removeKeyboardFocus()',

src/components/input/input.ts

@@ -19,6 +19,7 @@ import {
 import {
   NG_VALUE_ACCESSOR,
   ControlValueAccessor,
+  DefaultValueAccessor,
   NgModel,
 } from '@angular/forms';
 import {NgIf} from '@angular/common';
@@ -98,7 +99,7 @@ export class MdHint {
   templateUrl: 'input.html',
   styleUrls: ['input.css'],
   providers: [MD_INPUT_CONTROL_VALUE_ACCESSOR],
-  directives: [NgIf, NgModel],
+  directives: [DefaultValueAccessor, NgIf, NgModel],
   host: {'(click)' : 'focus()'}
 })
 export class MdInput implements ControlValueAccessor, AfterContentInit, OnChanges {

src/components/progress-circle/progress-circle.ts

@@ -53,11 +53,11 @@ export class MdProgressCircle implements OnDestroy {
    * because voiceover does not report the progress indicator as indeterminate if the aria min
    * and/or max value are number values.
    */
-  get ariaValueMin() {
+  get _ariaValueMin() {
     return this.mode == 'determinate' ? 0 : null;
   }
 
-  get ariaValueMax() {
+  get _ariaValueMax() {
     return this.mode == 'determinate' ? 100 : null;
   }
 

src/components/tabs/tab-group.html

@@ -16,8 +16,8 @@
 </div>
 <div class="md-tab-body-wrapper">
   <div class="md-tab-body"
-       *ngFor="let tab of tabs; let i = index"
-       [id]="getTabContentId(i)"
+       *ngFor="let tab of _tabs; let i = index"
+       [id]="_getTabContentId(i)"
        [class.md-active]="selectedIndex == i"
        [attr.aria-labelledby]="getTabLabelId(i)">
     <template role="tabpanel" [portalHost]="tab.content" [ngIf]="selectedIndex == i"></template>