Change octave-mode keys to mirror other modes.
Change octave-mode keys to mirror other modes.

The keybindings in octave-mode don't follow the same standards as the
others. Also use the function `spacemacs/set-leader-keys-for-major-mode`
for setting mode specific keys.

tsonntag/dotemacs,tsonntag/dotemacs,tsonntag/dotemacs,tsonntag/dotemacs