Added additional installation instructions from VimClojure

Hey,

I determined the reason for my problem with vim-clojure-static as discussed on the [mailing list ](https://groups.google.com/d/msg/vimclojure/YsoR9snJde0/YNc2dDK_BmMJ). Chalk it up to being a relative Vim newbie (when it comes to plugins and stuff...) but I didn't have a number of critical lines in my .vimrc. The VimClojure documentation recommends these be added, but as people are using a vim-clojure-static and vim-fireplace combination these days, perhaps it should be included here as well? Hence this pull request!

Cheers,
James