Added Wavefront OBJ format exporter

Exporter written by Apelsin:
https://github.com/Apelsin

TODO: Hookup avatar export

indra/newview/app_settings/settings_ascent.xml

@@ -642,5 +642,16 @@
 			<key>Value</key>
 			<boolean>0</boolean>
 		</map>
+    <key>OBJExportSwapYZ</key>
+    <map>
+      <key>Comment</key>
+      <string>OBJ Files saved swap Y and Z axes (useful for Cinema 4D users)</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>Boolean</string>
+      <key>Value</key>
+      <integer>0</integer>
     </map>
+  </map>
 </llsd>