Realistically, you'll be using neither termite nor urxvt if you have
access to a desktop environment since those usually include their own
terminal emulator that works out of the box anyway.
Additionally, many of the benefits from termite and urxvt are not a
necessity in other desktop environments.
Now that all the READMEs have been added, all that's left is to polish
them as time goes on. It may be useful to add images to each of the
package directories to show visually what each contain.