Initial commit
    
    First commit of the Fedora i3 SIG docs. This copies basic information
    from our wiki page and also instantiates a first draft of the SIG design
    goals from the Pagure ticket.
    
    * https://fedoraproject.org/wiki/SIGs/i3
    * https://pagure.io/i3-sig/Fedora-i3-Spin/issue/10
    
    Signed-off-by: Justin W. Flory <git@jwf.io>