EMI: Enable GL_BLEND when drawing EMI-model-faces

This fixes the fading in the EMI-intro
GRAPHICS: Use proper TGA decoder
EMI: Add MD5-hashes for French patched EMI.
Merge pull request #740 from usineur/master

EMI: Add MD5-hashes for French patched EMI.
EMI: Stub OverWorldToScreen, breaking the Control Options in ways.
JANITORIAL: Remove some commented code
EMI: Add Skeleton::{getParentJoint,getJointIndex}
EMI: Only update components for playing chores
EMI: Move skeletal animation to AnimationEmi
EMI: Implement Lua_V2::AdvanceChore
EMI: Share skeleton transformation among ANIM components