remove kill count from the core (it's been in Lua for a while)
clone combat rating translations into data/ui/Languages.lua

(only for languages that already exist in that file)
remove combat ratings (and "Right on commander") from the core translations
utils: Fix negative timestamp handling. closes: #1954
change Cutscene to cope with new-model
change Pi::FindModel to prefer new-models to LMR models
add an sgmodel conversion of the Lanner

Incomplete. Missing things:

* Patterns.
* Label positions.
* Decal positions.
* Hydraulic rams on the undercarriage.
* Collision warning lights
* Headlights (though I've been told we don't want those)
make the Lanner ship and Intro spinner use the sgmodel version
delete the LMR version of the Lanner
lanner: fix errors with vertex normals (fixes edge glitches)
lanner: add a pattern texture for the coloured stripe
Merge remote-tracking branch 'johnbartholomew/remove-kill-count'
Merge remote-tracking branch 'laarmen/fix_1954'
Merge remote-tracking branch 'johnbartholomew/sgmodel-intro'
lanner: remove duplicated vertices in collision mesh
Remove old WorldViewCamera files from project.
Add new CameraController.cpp/h files.
lanner: add a medium quality (single batch) LOD version
lanner: reduce pattern texture size to 256x256
lanner: remove alpha channel on diffuse texture
lanner: switch pattern texture to grayscale