better string for new alien item level in new battle menu

added to all languages, awaiting corrections.
also added the missing bulgarian.geo file (contains english info)

- looks like bulgarian translation needs some work
bin/data/Language/Polish.lng - STR_ENEMY_THREAT_LEVEL
Add two more strings for the translators

how are those portuguese and estonian translations coming along anyway?

adjusted the alien threat level string to alien weapon level.
sorry, but i'm not gonna re-translate them this time.
Merge branch 'master' of https://github.com/SupSuper/OpenXcom.git into Polish.lng

Conflicts:
	bin/data/Language/Polish.lng

Conflicts resolved.
fix for smoke visibility

the code as it was is fine, assuming maxViewDistance never dropped below 0,
which it frequently does when looking through smoke.
small fixes for smoke formulae

affects view distance by 2/3, instead of 1/2 (as per original)

alters the formula for divining the frame number to be more inline with original
updated romanian.lng

new string translated in record time, with thanks to cornels.
small code tidy in path finder
don't just ignore units with no spawn node

should fix unit placement issue on cydonia, needs testing.
not going to apply this function to regular missions, as it will result
in a base defense with 200 soldiers present.
fix for crash when exiting while building a base.
- Updated Hungarian Language
Merge pull request #419 from fenyo1/HUNlangUPD

Updated Hungarian Language
Merge pull request #418 from radius75/Polish.lng

bin/data/Language/Polish.lng
Merge pull request #415 from xanscale/master

code clean
remove unused arguments for battleUnit
tokens STR_LOW, STR_MEDIUM, STR_HIGH - to better explain meaning (in Weapon Level description)
extend elevator placement textbox for verbose languages.
wrap the words on the info box
small fix in ufo size checks
Merge pull request #420 from radius75/Polish.lng

Polish.lng - tokens STR_LOW, STR_MEDIUM, STR_HIGH