vimrc: improve autojump on BufReadPost: only once
vimrc: improve / add AutojumpLastPosition
Update submodule oh-my-zsh 3a5b092...05a074c

* oh-my-zsh 3a5b092...05a074c (3):
  > alias g => gv; doc
  > Remove connect-to-moby (=> local config)
  > zshrc: ~df, pip aliases, viag, viack fix