Jacobian still does not work T.T

- But, getting closer
- Note that numpy array: a, b
  a = b is actually pointer so
- Use
  a = b.copy()
Revert "Jacobian still does not work T.T"

This reverts commit 71b7aed40f56d11e886c057a14a931e0df74cb59.
Merge branch 'master' of https://github.com/sgkang/simpegEM1D
Merge branch 'master' of https://github.com/sgkang/simpegEM1D
Merge branch 'master' of https://github.com/sgkang/simpegEM1D
Merge branch 'master' of https://github.com/sgkang/simpegEM1D
Removing numba