Remove old Vim keymap.
Rename example vim config.
Remove unused fields from KeymapSet.
Remove vim option from first launch wizard.
s/Vim2/Vim/g
Convert last mention of vim2.
Remove abandoned keymaps and replace startup wizard with static instructions.
Merge pull request #554 from ethercrow/remove-old-vim-keymap

Remove old vim keymap.
Fix vim keymap behavior regarding :q.

:q, :q!, and :qa! were all misbehaving. Fix :q to error if the file is
modified and unsaved, and have :q! not close all windows. :qa! now
simply closes all windows without checking for unsaved changes in
buffers.
Merge pull request #560 from jhance/vim-ex-quit

Fix vim keymap behavior regarding :q.