Allow aircraft to be selectable from intercept window when out

Feature request 242
Compulsory adoption of new intercept screen
Make LMB consistently set destination in intercept screen
feature242 continued
fix LoS

 - when a calculation is made to a potentially spotted enemy unit,
   but another unit is blocking that LoS, the trajectory stops at
   that unit and TileEngine::visible() returns true.
 - this fix includes a last check to ensure that the unit that's
   attempting to be spotted is really the unit that the trajectory
   stops at. If not, return false.
Grey strings "Saving game" and "Loading game" in battlescape.
Stop autofire when shooter shoots out floor without flying armor.
Fix compile error
  - Remove LanguageState.cpp/.h in openxcom_SOURCES,
    which should be OptionsLanguageState.cpp/.h

Remove whitespaces after backslash complained by Autotools
Merge pull request #664 from keeper7478/master

Fix compile error
Merge branch 'feature242' of https://github.com/cfailde/OpenXcom

Conflicts:
	src/Menu/OptionsAdvancedState.cpp
cancel action on opening inventory or stats screen.

fixes some associated bugs.
Bug #288
bigger bases have bigger detection chance...
Armor ufopedia description
Merge pull request #1 from SupSuper/master

cancel action on opening inventory or stats screen.
src/Basescape/ResearchInfoState.cpp
bin/data/Language/en-US.yml

http://openxcom.org/forum/index.php/topic,1603.msg14797.html#msg14797
Geoscape Craft Info: include soldiers & vehicles if transport
Update en-GB.yml
Add Melee action type BT_MELEE and melee damage assimilated as ARMOR PIERCING
fix logic fail in BGen.