A pure-Ruby X11 terminal

A pure-Ruby X11 terminal emulator that serves as a full xterm replacement, built entirely in Ruby down to the font renderer and X11 bindings. It is for developers who enjoy extreme language homogeneity and hacking on their tools, particularly those already running a Ruby-based window manager and editor. Its interest lies in being a technically audacious, self-imposed constraint that demonstrates the feasibility of a performant terminal written entirely in a high-level language.