Use map.Contains for the observer shroud check.

Checking against the bounds directly is no longer valid.
LevelUpCrate
Merge pull request #5779 from MustaphaTR/bleed

Level Up from Crate at D2K
Add support for diamond cell grids.
Extract TS blank-conquest map.
remove blank-testmap.
Enable isometric perspective in TS.
Fix sprite overlap outside the map border.
master server has been migrated to new machine and DNS

closes #5748
Merge pull request #5780 from Mailaender/master.openra.net

Changed master server URL to openra.net subdomain
Fix TS refinery and repair pad using snow gfx

Until we support TS theater-specific graphics, we should stick to one of the theaters, temperate in this case.
Use Prerequisites: ~disabled for unbuildable actors.
capturable production queues
remove unused copy pasta from TD
document the buildable and country trait
document SelfHealing prerequisites
add a missing space for multi line property documentation
remove pill boxes and hijacker from Allies02
Merge pull request #5759 from Mailaender/ra-tech-capture

Added capturable tech to Red Alert
allow artillery to shoot over walls