Added xBRZ scaler.
Some more GLSL shaders for good measure.
Fix.
Fixx
Fixxx
Give crafts unique ids in the form of a type+id tuple. Since we can now safely hold "weak pointers" to crafts, let UFOs refer to their killer by unique id, instead of a pointer that may be deallocated or reused
Provide a savegame method to look up a craft by its unique id, it could always come in handy
Merge branch 'master' of https://github.com/SupSuper/OpenXcom into work
Merge from work branch