Fixes case where base is lost and craft is following ufo

After base is lost, prevent the game asking player to redirect the now
homeless craft.
Update Italian.nam

just some surname more, perhaps southern-italy oriented :D
Merge pull request #488 from cfailde/crash_fix_on_base_lost

Fixes case where base is lost and craft is following ufo
Merge pull request #489 from cybergerac/patch-1

Update Italian.nam
strings renamed.

update ALL the things.
handling for single-image "extraSprites"
Concentrated base defense logic in one place

Removes code duplication.
fix end of mission/abort mission crash.
whoops.
fix blit order of smoke (bigwalls!)
Fix three small bugs in cydonia.

during transition:
select the first HUMAN unit (avoids tank inventory screen)
reset the turn counter to 1
unexpose all the humans.
stop the last hit from missing all the time in the dogfight.
allow defining directories for surface sets.
make inventory screen more modder friendly.
fix ufopedia re: new armor types
Merge pull request #490 from cfailde/tidy_up

Concentrated base defense logic in one place
Belgium and Netherlands names.
changes to path highlighter

these surfaces are extra large so you can draw lines between the tiles,
if you so choose.
makefile.
fix crossplatform folder import