Removing simulator opening shortcut from `.bundlesVimRc` - Add comment about how to add it back.

Here's how you'd setup the `cmd+shift+r` command to run test cases and then open the quickfix window:


    " Executes shell script and makes it available to the qf window - `copen`
    " would then open it which disturbs window positions so instead we call
    " ToggleQuickfixList()
    function! TestAndOpenTheQuickFix()
      " cexpr system('./test.sh') | copen
      cexpr system('node ./build.js driver run') | call ToggleQuickfixList()
    endfunction
    :command! TestAndToggleQuickFix :call TestAndOpenTheQuickFix()

    map <silent><D-R> :w<CR>:TestAndToggleQuickFix<CR>
    imap <silent><D-R> <Esc>:w<CR>:TestAndToggleQuickFix<CR>
    vmap <silent><D-R> <Esc>:w<CR>:TestAndToggleQuickFix<CR>

It might be worth it to create a plugin that looks inside a `package.json` file and determines how to run tests.