Adding Cameras / gun tags to Deneb
* Fixing camera tags
* Removing thrusters / labels / decals from lower LOD's

Note - Materials need assigned to the model but I plan on doing some updates to this model (including a re-texture) soon so not bothering fixing it now.
Fixing bottom camera name (so that its actually named)
Merge remote-tracking branch 'zordey/deneb_camera'
remove the camera_offset and gun_mounts fields from data/ships/deneb.lua