a new theme, different from the already existent themes :)

Hi!
I want to share the theme I created for myself that sports:

* different color prompt depending on `id`: <img src="http://michelebologna.net/wp-content/2012/12/oh-my-zsh_prompt.png" /> <img src="http://michelebologna.net/wp-content/2012/12/oh-my-zsh_prompt_root.png" />
* zsh prompt (%) color based on last command output ($?): <img src="http://michelebologna.net/wp-content/2012/12/oh-my-zsh-lastret-color.png" />
* git repo in the current directory - branch + status (unstaged changes?): <img src="http://michelebologna.net/wp-content/2012/12/oh-my-zsh-git.png" />
It also has an option to auto-generate color for the hostname (based on hostname string kind-a "hashing").

Thanks and keep up with the good work with oh-my-zsh!