RICH updates for proposal run

close #132 (closed) and #123 (closed)

Changes / TODO:

• added compact file constant ERICH_sensor_dist, to more easily expose the sensor plane position
• adjusted sensor DetElement IDs
• added 0.01mm airgap between aerogel and filter (actually it is a gas gap)
• remove eRICH sensor size doubling, which was a temporary workaround for graphics performance
  • instead the sensor drawing is set to invisible in the geoviewer (compact/display_geoviewer.xml); we want the correct sensor size for full coverage at high theta
• reduce bore radii
• update material property tables (aerogel, gas, etc.)
• optimize aerogel and filter inner and outer radii
  • change solid from Tube to Cone
  • tune inner radii to follow bore radius, and make as small as possible
  • for dRICh, tune outer radius to follow snout cone, and make as large as possible
  • aerogel and filter are no longer in sector loop
  • for eRICh, remove sector dependence/loops altogether
• check optics, namely at low theta

compact/subsystem_views/drich_only.xml

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