clean up OpenRA.Game/*.dll left-overs
Added ExplosionPalette and WaterExplosionPalette traits to Warheads.

This is needed for TS water splashes, for example (they use unit*.pal instead of anim.pal).
Defaults to "effect".
Merge pull request #5123 from Mailaender/clean-openra-game-dll

Additions to Makefile for cleaning up OpenRA.Game/*.dll left-overs
Merge pull request #5125 from reaperrr/explosion-palette

Added ExplosionPalette and WaterExplosionPalette traits to Warheads
Add a camera to the Ion Cannon. Fixes #5058.
update to GeoIP2 and parse the database only once

closes #4227
Merge pull request #4666 from Mailaender/geoip2

Updated to GeoIP2
Make nuke flight time independent from map size.
Add a camera to the nuke.
Change D2K airstrike shroud reveal to match TD.
Support indefinite beacon duration for support powers that remove the beacon on completion.
Persist the nuke beacon until detonation.
Fix GDI03 airstrike power.
Update changelog.
Merge pull request #5066 from pchote/weapon-cameras

Superweapon tweaks
add crane animation to Dune 2000 and Tiberian Sun

closes #3754
remove clutter from overlays