Add support for full-width

CHANGELOG.md

 # CHANGELOG
 
+## 1.3.5
+
+* *Improvement:* Add support for full-width cms pages
+
 ## 1.3.4
 
 * *Bugfix:* Set correct XSD URN

etc/content_provisioning.xsd

@@ -142,6 +142,7 @@
             <xs:enumeration value="2columns-left"/>
             <xs:enumeration value="2columns-right"/>
             <xs:enumeration value="3columns"/>
+            <xs:enumeration value="cms-full-width"/>
         </xs:restriction>
     </xs:simpleType>
 </xs:schema>