Mentioning dependencies in the readme.

Help prevent other issues like #698

Author: mlh758

README.markdown

@@ -1,8 +1,9 @@
 # jQuery UI MultiSelect Widget
 
-MultiSelect progessively enhances an ordinary multiple select control into elegant drop down list of checkboxes, stylable with ThemeRoller.  
+MultiSelect progessively enhances an ordinary multiple select control into elegant drop down list of checkboxes, stylable with ThemeRoller.
 
-![Example](http://www.erichynds.com/examples/jquery-multiselect/screenshot-widget.gif)
+### Requirements
+The [usage](https://github.com/ehynds/jquery-ui-multiselect-widget/wiki/Usage) section of the Wiki specifies the widget's dependencies.
 
 # License