code clean
better odds of psi attack

less influence from difficulty and higher overall chances.
Merge pull request #405 from xanscale/master

code clean
CONTROLS PART 2 (Battlescape)
It's recommended you reset your options to default.
- Changed debug key to Ctrl-D to avoid conflicts.
- Fixed accuracy vanishing when at 0%.
- Fixed cursor not updating with map scrolling.
- Fixed button sound playing when using scrollwheel.
- Various UI fixes.
- Updated German translation.
fix for item pickup bug

make sure the actor is assigned.
Update Italian
Merge pull request #413 from xanscale/master

update italian
Updated Spanish
fix for boolean checks.

1 may be true, but so is 2 and 3 and 4.
More UI fixes for translators.