Deployment improvements

Replace deploy.sh with deploy.py
Some updates to setup scripts, for more consistency
Split out some common unix setup tasks into a script that both mac and
linux scripts call.

setup_mac.sh

@@ -5,12 +5,12 @@ brew update
 brew install fish git
 brew cask install emacs
 
-git clone https://github.com/syl20bnr/spacemacs .emacs.d
+curl -s 'https://macapps.link/en/firefox-bettertouchtool-dropbox-alfred-sublime-iterm-unarchiver-transmit' | sh
 
 sudo bash -c "echo /usr/local/bin/fish >> /etc/shells"
 chsh -s /usr/local/bin/fish
 
-cat /dev/zero | ssh-keygen -q -N ""
+ssh-keygen -t rsa -f $HOME/.ssh/id_rsa -q -P ""
 
 echo "Your SSH public key is:"
 echo ""
@@ -18,5 +18,5 @@ cat ~/.ssh/id_rsa.pub
 echo ""
 read -p "Please add it to GitHub, then press enter to continue."
 
-curl -s 'https://macapps.link/en/chrome-bettertouchtool-dropbox-alfred-sublime-iterm-unarchiver-transmit' | sh
-
+git clone git@github.com:tim-mccarthy/dotfiles.git $HOME/.dotfiles
+bash ~/.dotfiles/setup_unix_common.sh