Add Mouselook IFF from Alchemy!

Also Assorted Code Cleanup and sync with Alchemy
Debug Settings are AlchemyMouselookIFF and AlchemyMouselookIFFRange
Look to see if an avatar is in a nearby region always when checking if they're an estate owner.

indra/newview/app_settings/settings_ascent.xml

@@ -135,6 +135,28 @@
       <key>Value</key>
       <integer>0</integer>
     </map>
+    <key>AlchemyMouselookIFF</key>
+    <map>
+      <key>Comment</key>
+      <string>Display user that is currently focused upon by crosshair in mouselook</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>Boolean</string>
+      <key>Value</key>
+      <integer>1</integer>
+    </map>
+    <key>AlchemyMouselookIFFRange</key>
+    <map>
+      <key>Comment</key>
+      <string>Range of IFF display</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>F32</string>
+      <key>Value</key>
+      <real>380.0</real>
+    </map>
     <key>AlchemyRainbowEffects</key>
     <map>
       <key>Comment</key>