Draft: Resolve "add IRT geometry to RICH cpp files"

Closes #144

• Branch cloned and rebased from irt-init-v01 (to avoid danger of rebasing shared branch)
• requires irt module

compact/subsystem_views/drich_only.xml

@@ -67,7 +67,7 @@
     ## dRICh only
   </documentation>
 
-  <include ref="ip6/central_beampipe.xml" />
+  <!-- <include ref="ip6/beampipe.xml" /> -->
   <include ref="compact/drich.xml" />
 
 </lccdd>