Make unit_tactical_ai.lua use raw_move_command (Spring 97.0.1-27) (again)

unit_tactical_ai.lua: use CMD_RAW_MOVE
customcmds.h.lua: add CMD_RAW_MOVE
add
cmd_raw_move.lua: handle raw_move_cmd as CMD_RAW_MOVE

clusterTool.lua: some cleanup for easy reading.