Add a dos inspired theme for oh-my-zsh

- C prompt by default
- F prompt if the previous command had an exit code other than 0
- G prompt when in a git repository, followed by the branch name (in yellow) and the status (dirty in red, clean in green)

Extras/Chicago95.zsh-theme

@@ -0,0 +1,12 @@
+local ret_status="%(?:C:F)"
+function __msdos_pwd() {
+	local __path=$(pwd)
+	echo $__path | tr '/' '\\'
+}
+PROMPT='${ret_status}:$(git_prompt_info)$(__msdos_pwd)>'
+
+local ret_status_git="%(?:G:F)"
+ZSH_THEME_GIT_PROMPT_PREFIX="\b\b${ret_status_git}:\\%{$fg[yellow]%}"
+ZSH_THEME_GIT_PROMPT_SUFFIX="%{$reset_color%}"
+ZSH_THEME_GIT_PROMPT_DIRTY="%{$reset_color%}\\%{$fg[red]%}dirty"
+ZSH_THEME_GIT_PROMPT_CLEAN="%{$reset_color%}\\%{$fg[green]%}clean"