add to readmes

Author: jelbourn

src/components/menu/README.md

@@ -27,6 +27,12 @@ import {MdMenuModule} from '@angular2-material/menu';
 export class MyAppModule {}
 ```
 
+For alpha.7, you need to include the overlay styles in your app via a `link` element. This will
+look something like
+```html
+<link href="vendor/@angular2-material/core/overlay/overlay.css" rel="stylesheet">
+```
+
 ### Simple menu
 
 In your template, create an `md-menu` element. You can use either `<button>` or `<anchor>` tags for 

src/components/tooltip/README.md

@@ -1,6 +1,14 @@
 # MdTooltip
 Tooltip allows the user to specify text to be displayed when the mouse hover over an element.
 
+### Setup
+For alpha.7, you need to include the overlay styles in your app via a `link` element. This will
+look something like
+```html
+<link href="vendor/@angular2-material/core/overlay/overlay.css" rel="stylesheet">
+```
+
+
 ### Examples
 A button with a tooltip
 ```html