fixed losing in the assault of alien base.
makefile fix
make that file, dammit.
UI fixes
Merge branch 'master' of https://github.com/SupSuper/OpenXcom
make UFOs airtight

fix the leaky walls
fix hang on MC bug
fix auto end?

now watch it break.
haha, yeah, that too.
fix throw distance calcs
Merge pull request #748 from redv/fix_ab_assault

Fix: Losing in the assault on alien base.
pay more attention in class
fix warning.