Fix extended boundary conditions

JumpReg
---- 64 x 64 ----
Convergence: -0.349459019401

---- 128 x 128 ----
Convergence: 6.42038425625

---- 256 x 256 ----
Convergence: 1.17560233229

---- 512 x 512 ----
Convergence: 1.77488843789
Remove util/jump.py