Fixes units walking through terrain.
A compiler defect made the engine read the wrong half of every walkability
flag, so every tile of every map counted as passable to the collision check.
Units crossed cliffs and water. Terrain now blocks movement as it should.
Also: the title picture is raised so the publisher's logo is no longer clipped.
Everything else is as in v0.2.1.
Still open: weak computer opponent, no sound, no campaign, no multiplayer.
Start SC_universal. No game data included — see
HOW_TO_LOAD_PC_FILES.txt. No FPU required.