Reworked LLToolCompGun so piemenu in mouselook plays nicer with zoom feature

Switches to exodus implementation
Includes relicensing of LLViewerCamera and LLToolComp
Maintains use of the old saved zoomed setting

indra/newview/app_settings/settings.xml

@@ -210,17 +210,6 @@
     <integer>100</integer>
   </map>
   
-  <key>zmm_deffov</key>
-  <map>
-    <key>Comment</key>
-    <string>Default field of viewer for right click mouse zoom.</string>
-    <key>Persist</key>
-    <integer>1</integer>
-    <key>Type</key>
-    <string>F32</string>
-    <key>Value</key>
-    <real>1.0</real>
-  </map>
   <key>zmm_mlfov</key>
   <map>
     <key>Comment</key>
@@ -232,28 +221,6 @@
     <key>Value</key>
     <real>1</real>
   </map>
-  <key>zmm_isinml</key>
-  <map>
-    <key>Comment</key>
-    <string>mouselook</string>
-    <key>Persist</key>
-    <integer>0</integer>
-    <key>Type</key>
-    <string>Boolean</string>
-    <key>Value</key>
-    <integer>0</integer>
-  </map>
-  <key>zmm_rightmousedown</key>
-  <map>
-    <key>Comment</key>
-    <string>insert rude comment here</string>
-    <key>Persist</key>
-    <integer>0</integer>
-    <key>Type</key>
-    <string>Boolean</string>
-    <key>Value</key>
-    <integer>0</integer>
-  </map>
 
   <key>AllowLargeSounds</key>
   <map>