Fix broken Markdown headings

README.md

@@ -11,7 +11,7 @@ Currently, almost the jQuery API is written and all CSS3 selectors should be sup
 We are working in a brand new web site, in the meanwhile for more information/documentation
 visit gQuery wiki pages at : https://code.google.com/p/gwtquery/
 
-##Thanks to
+## Thanks to
 [![Arcbees.com](http://i.imgur.com/HDf1qfq.png)](http://arcbees.com)
 
 [![Vaadin.com](https://rawgit.com/manolo/vaadin-stuff/master/vaadin-ui.png)](http://vaadin.com)