Otherwise just copy-paste everything from [plugin/bracketed-paste.vim](https://github.com/ConradIrwin/vim-bracketed-paste/blob/master/plugin/bracketed-paste.vim) into your `~/.vimrc`.
You need to be using a modern xterm-compatible terminal emulator (xterm, urxvt, and iTerm2 are known to work, and modern gnome-terminal should too) that supports [bracketed paste mode](http://cirw.in/blog/bracketed-paste).
The code for this plugin was taken from Chis Page's answer to a [StackOverflow question](http://stackoverflow.com/questions/5585129/pasting-code-into-terminal-window-into-vim-on-mac-os-x), I just packaged it.