updated documentation

Included suggestions from #58.

docs/assets/plunker.js

@@ -18,7 +18,7 @@ angular.module('plunker', [])
           '    <script src="//ajax.googleapis.com/ajax/libs/angularjs/'+ngVersion+'/angular.js"></script>\n' +
           '    <script src="//ajax.googleapis.com/ajax/libs/angularjs/'+ngVersion+'/angular-animate.js"></script>\n' +
           '    <script src="//ajax.googleapis.com/ajax/libs/angularjs/'+ngVersion+'/angular-sanitize.js"></script>\n' +
-          '    <script src="//morgul.github.io/bootstrap/ui-bootstrap-tpls-'+version+'.js"></script>\n' +
+          '    <script src="//morgul.github.io/ui-bootstrap4/ui-bootstrap-tpls-'+version+'.js"></script>\n' +
           '    <script src="example.js"></script>\n' +
           '    <link href="//netdna.bootstrapcdn.com/bootstrap/'+bsVersion+'/css/bootstrap.min.css" rel="stylesheet">\n' +
           '  </head>\n' +

docs/index.html

@@ -2841,7 +2841,9 @@ The parent scope instance to be used for the modal&#39;s content. Defaults to <c
 </li>
 <li><p><code>size</code>
 <em>(Type: <code>string</code>, Example: <code>lg</code>)</em> -
-Optional suffix of modal window class. The value used is appended to the <code>modal-</code> class, i.e. a value of <code>sm</code> gives <code>modal-sm</code>.</p>
+Optional suffix of modal window class. The value used is appended to the <code>modal-</code> class, i.e. a value of <code>sm</code> gives <code>modal-sm</code>. 
+(<i>Note: Since this is directly injected into the class for the modal, you can leverage additional Bootstrap modal classes, such as <code>modal-dialog-centered</code>.
+Ex: <code>md modal-dialog-centered</code>.</i>)</p>
 </li>
 <li><p><code>template</code>
 <em>(Type: <code>string</code>)</em> -