Evil jump list is cleared on window recreation

Originally reported by: **Oleg Kostyuchenko (Bitbucket: [olegkst](https://bitbucket.org/olegkst), GitHub: [olegkst](https://github.com/olegkst))**

----------------------------------------

Hi,

Please do not use window id as a hash key in evil-jump.el.

If the workflow is based on "emacs --server" + emacsclient, a window id is a very ephemeral thing. Consider the following scenario:
- A user opens an emacsclient window, jumps 1000 times in some buffer and closes the window.
- Then he opens another emacsclient window and switches to the same buffer. All the 1000 jump marks are instantly lost.

Please implement a jump list storage that is able to survive a window id change.

Thanks

----------------------------------------
- Bitbucket: https://bitbucket.org/lyro/evil/issue/732

Start by reading evil-jump.el, especially how the jump list is keyed by window id. Reproduce the emacs --server and emacsclient workflow described in the issue, closing and recreating a window on the same buffer. Done means jump marks remain available after the window id changes.

Written by the indexing model from the issue text.