Breaks vim-sneak

I tried g:yankstack_map_keys = 0, but it still mapped stuff to s and S..

I looked into yankstack and it seems that this option just works for the M-p/M-P keys.

EDIT: I try to clarify - I would like to have an option to disable yankstack hijacking some of the keys with something like:

  let g:my_yank_keys  = ['c', 'C', 'd', 'D', 'x', 'X', 'y', 'Y']
