Add Python 3 and Tcl/Tk to Dependencies.md
Add Python 3 and Tcl/Tk to Dependencies.md

the-xkcd-community/the-red-spider-project,the-xkcd-community/the-red-spider-project,the-xkcd-community/the-red-spider-project,the-xkcd-community/the-red-spider-project,the-xkcd-community/the-red-spider-project,the-xkcd-community/the-red-spider-project,the-xkcd-community/the-red-spider-project,the-xkcd-community/the-red-spider-project,the-xkcd-community/the-red-spider-project,the-xkcd-community/the-red-spider-project,the-xkcd-community/the-red-spider-project