Build 140222

Killed performance, optimized bugs... or was it another way around? Anyway:

• New feature: "X-Ray" HUD mode (separate for target markers and wireframes), pretty handy whenever someone hides behind some wall.
• Half of the mines on open-air levels now follow you just like they did in the Constraint tunnel, detonating whenever colliding with an obstacle.
• Mines outdoors now have spawn offsets higher than the drones in order to less frequently explode in your face right on being spawned.
• Fixed the messy Oren-Nayar light model used on the Moon on map 1, also reduced the Sun's visible brightness a bit.
• Improved wireframe rendering (no Z-clashing, better background clipping).
• Some other HUD de-bugs I forgot which ones exactly (though I guess those were the last of the visual bugs so far).
• A workaround to disable the trick of making a missile clip into your cockpit.
• As I still made no simplified collision mesh for the tunnel (do I have to? I had no issues on any of my rigs, tell me if you need it as I see no point to hurry so far), the default config no longer clears the corresponding checkbox...