Updated translation

Updated latest strings
Removed blinking grey area in the "Hidden movement" state;
Centered "Loading game" and "Saving game" messages;
Stop trying to access tiles off edge of map
Abort hit checks as soon as tile is out of map
Move ai action limit check

.. to prevent possiblity of ai moves completing during player turn.
don't need save _inDogfight flag
Merge pull request #617 from Xracer/patch-1

Updated translation
Merge pull request #620 from redv/interface6_hidden_movement

UI improvements: fix for wide screens
Merge pull request #622 from redv/fix_dogfight

Fix: Bug report #237 - Interceptor can never enter air combat again, when game was saved while in air combat
Fixed compilation error on GCC
Fixed "Battlescape/Map.cpp:89:59: error: incomplete type 'OpenXcom::Screen' used in nested name specifier'"
Merge pull request #623 from winterheart/fix-compile-gcc

Fixed compilation error on GCC
Separate conversion from tallying
2-line fix for edgescrolling in Battlescape.

When scrolling diagonally and sliding the cursor to a straight
lateral scroll, the vertical component wasn't negated
Code cleanup
Moved ruleset documentation to wiki
Fixed Dutch language bugs
Added estimates for craft repairing/refueling
Typo
Fixed bug #234 - HWP Fusion Bombs take up 10x the store space they should
ARM fixes