Fixed coordinate transformation code.
The hand is now positioned and rotated correctly in the world.
sp/src/game/server/holodeck/holo_button_panel.cpp
 * Fixed silly mistake: I should have converted activation angle to a direction vector before attempting to find the difference in angles.

sp/src/game/server/holodeck/holo_hand.cpp
sp/src/game/server/holodeck/holo_hand.h
 * Moved Leap->Player space transformation code into the `SFrame` structure.

sp/src/game/shared/holodeck/holo_shared.cpp
sp/src/game/shared/holodeck/holo_shared.h
 * Made the origin for Leap space 50cm behind the device. This number feels good in game.
Little fix to the button panel.
Committed HL2 scene files.