Added an extension category

info.xml

@@ -16,11 +16,12 @@
     <email>[email protected]</email>
   </maintainer>
   <releaseDate>2016-11-20</releaseDate>
-  <version>2.02</version>
+  <version>2.03</version>
   <develStage>stable</develStage>
   <compatibility>
     <ver>4.7</ver>
   </compatibility>
+  <category>Data Cleaning</category>
   <comments>The email addresses were selected based on Future First's experience of common email errors.</comments>
   <civix>
     <namespace>CRM/Emailamender</namespace>