[RFC] vim-patch:7.4.213

Merging vim-patch:7.4.213 into neovim and docs.

This PR contains only the modification for the doc file `recover.txt`. PR ([neovim/522](https://github.com/neovim/neovim/pull/522)) takes care of the source code modifications.

Problem:    It's not possible to open a new buffer without creating a swap
            file.
Solution:   Add the ":noswapfile" modifier. (Christian Brabandt)

https://code.google.com/p/vim/source/detail?r=e25a04c1c515e6eb32197291472f89bcadfabf89