Update threephase package

After optimization, the initialization time of threephase is now less than 7 seconds on my laptop. 
BTW, once I try to compile it into javascript, the generated .js file doesn't contain the threephase package. Do you know how to compile it with threephase package included?
"raw2sym" is a temporary array for accelerating the initialization of the Center1 move table by replacing the "int getsym()" function. After the initialization of the move table, the "raw2sym" table can be removed as the "int getsym()" function won't be called much times later.