Linux (Cygwin) doesn't like spaces in path names so setup.sh fails utterly on
Windows if you have a username with spaces in it. This change double quotes all
the ln and touch commands so space-addled paths are handled properly.
.zshenv is run everytime a zsh instance is started, including subshells and the
like. Use this file, now, to set things like PATH and such that are used
frequently.
Add a setup symlink for .zshenv
