HeadMorph - implement weights, blending, and multiple morphs at the same time

[JaXt0r]

Gothic leverages sophisticated MorphMeshes for NPC heads. Following features need to be implemented:

• Allow 1-frame sized animations (no interpolation between frames possible)
• Allow multiple animation to be played at the same time
• Play random animation "R_EYESBLINK" randomly (add it to _runningMorphs whenever it's time to do so)
• Add blending weight (Morphs have at least 3 states: BlendIn, Animation, BlendOut) use blending values to calculate weights
• Check why blinking is too slow by about factor 100. (But VobAnimate is correct in terms of morph speed; might be solved when blended automatically.)
• Only add one MM per layer (e.g. facial expression neutral will overwrite hurt if set) (e.g. via SortedList which allows only one entry per int-value)
• higher layers overwrite lower layers. (e.g. if layer4 animation is weight=1, then all other animations are weight=0)

[JaXt0r]

Only partially implemented so far. Other checkboxes need to be solved as well.