Homebrew: update Brewfile
Homebrew: update Brewfile

I'm about to start playing with Homebrew Cask, so let's take a snapshot
of my current Brewfile.

This is just the output of `brew list` with `install` prepended to each
line of the ouput and a `--with-pcre` flag added to the `install git`
line.

wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent