focusin/focusout: use consistent categories

Fixes gh-619
Closes gh-707

Author: alexangas

entries/focusin.xml

@@ -42,6 +42,7 @@ $( "p" ).focusin(function() {
 ]]></html>
   </example>
   <category slug="events/form-events"/>
+  <category slug="forms"/>
   <category slug="version/1.4"/>
   <category slug="version/1.4.3"/>
 </entry>

entries/focusout.xml

@@ -62,8 +62,8 @@ $( "p" )
 <div id="blur-count">blur fire</div>
 ]]></html>
   </example>
-  <category slug="events/keyboard-events"/>
-  <category slug="events/mouse-events"/>
+  <category slug="events/form-events"/>
+  <category slug="forms"/>
   <category slug="version/1.4"/>
   <category slug="version/1.4.3"/>
 </entry>