Public repository of home directory config files, with a setup script.

• .gitignore Configure repo, system-wide gitignore.
• gitconfig Add git aliases, user info.
• screenrc Set screen to start with vim and terminal, use hardstatus.
• setup Run to symlink files from this repo into $HOME.
• vimrc Add vim keybindings and file behavior.
• zshrc Add zsh keybindings and screen support.