Add class declaration sniff.

Author: Spencer Rinehart

DWS/ruleset.xml

@@ -3,6 +3,7 @@
     <description>The coding standard for the DWS architecture team</description>
 
     <rule ref="Squiz.Arrays.ArrayBracketSpacing" />
+    <rule ref="PEAR.Classes.ClassDeclaration" />
     <rule ref="Squiz.Classes.LowercaseClassKeywords" />
     <rule ref="Squiz.Classes.SelfMemberReference" />
     <rule ref="Generic.CodeAnalysis.EmptyStatement" />