Merge branch 'snack-bar' of https://github.com/josephperrott/material2 into snack-bar

Author: josephperrott

src/lib/snack-bar/snack-bar-container.scss

@@ -10,6 +10,7 @@ $md-snack-bar-max-width: 568px !default;
   @include md-elevation(24);
   background: #323232;
   border-radius: 2px;
+  box-sizing: content-box;
   display: block;
   height: $md-snack-bar-height;
   max-width: $md-snack-bar-max-width;

src/lib/snack-bar/snack-bar.ts

@@ -21,9 +21,6 @@ import {MdSnackBarRef} from './snack-bar-ref';
 import {MdSnackBarContainer} from './snack-bar-container';
 import {SimpleSnackBar} from './simple-snack-bar';
 
-export {MdSnackBarRef} from './snack-bar-ref';
-export {MdSnackBarConfig} from './snack-bar-config';
-
 // TODO(josephperrott): Automate dismiss after timeout.