fix camera "onscreen" determination

for units and skipped projectiles
english revision, apologies to translators.
disambiguate nothingness
guess i'll add this to the menu

cause the translators don't hate me enough yet.
Fixing future RGB problems
Smooth that zoom
Add vanilla takeoff time to crafts.
fix hidden movement positioning
Merge remote-tracking branch 'upstream/master' into experimental

Conflicts:
	src/Engine/Palette.cpp
	src/Geoscape/Globe.cpp
	src/Menu/IntroState.cpp

Put #ifdefs in palette loading routines, as SDL_Color structure no longer has member "unused" (instead it's "a" now)
Go back to big DOS letters (as if your resolution is suddenly 320x200 again)
Make exiting the scanner view easier (does anyone even use that thing anyways?)