Added K' to constants as K uint array.
Implemented KL function pending WS variable
Added H(K') constants from table data as H_K.
Added J(K') from table data as J_K uint array.
Added S(K') from table data as S_K uint array.
Added W(K') from table data as W_K uint array.
Moved constants into it's own package.
Moved large constants into their own files.

Added WS, Al, and T constants to constants.go as per Matt's
instructions.
Updated generator to take from constants package.
Changed constants from uints to ints.
Added missing constants prepending.
Updated constants in encoder