add Arne's terror unit weapon sprites
add shotgun behaviour

multiple projectile tracing and hit insertion
no multiple projectiles animation at this point, that would require far
too much alteration to deeply integrated code.
Don't forget the black bars!!
Merge pull request #779 from fenyo1/FixSoldierReorder

Fix: Incorrect up/down move of the mouse cursor on Soldier Reorder
Fix crash when mods are modding mods.
MODCEPTION
Zombification as a property of item not unit
Fixed random_shuffle to use the same RNG as the game.
Compiler error?
Require the correct Yaml version for CMake as well.

The autotools configure script will complain if it can only find a 0.3.0 API version of yaml-cpp when the new 0.5.0 one is required. The CMake project however is happy, but the project then fails to compile.
Fuck compilers
ammo properties: bullet and explosion speed

bullet speed can now also be set on a per-ammo basis, and you can
customize the speed at which the animation plays.
Merge pull request #781 from JoakimSoderberg/cmake_yaml

Require the correct Yaml version for CMake as well.
explosion speed factor 10
xcom operatives: more efficient than we thought.
ammendment: not 20% per base

it's 20% chance to find one at all, and it'll be the first undiscovered one.
add some spice: influence odds of UFOs detecting XCom

use the difficulty as a multiplier! aww yeah.