Add sample .conkyrc + note about bar_action = conky for +A bar readout

[historical-theology]

The one trouble with using a shell script for the spectrwm bar is that any shell scripts is not going to be portable/cross-platform. What made this apparent to me was trying to find a script to clone (as a non-programmer and non-scripter) for my FreeBSD installation; the default baraction.sh in the FreeBSD package is actually written for OpenBSD, and most iterations across the Web are for GNU/Linux (and written in Bash rather than Bourne or another more common *BSD shell).

A conky configuration, however, is almost entirely cross-platform (save odds and ends like mixer vs. pulseaudio) -- and easy. I think that it would be good for the project to include a sample conky configuration and a note about the option of installing and using conky directly in the same .spectrwm.conf file. What I have done here is a (very) simple iteration of just that idea.

Many thanks for all of your great work on my favorite window manager, folks.

[LordReg]

The main baraction.sh file is just an example that works on OpenBSD since the main directory targets OpenBSD. An example for GNU/Linux was merged a couple years ago and is under linux/. If someone wants to submit an example for FreeBSD, it could be added under freebsd/. We have generally avoided including configuration files for other programs. I think the spectrwm wiki would be a more appropriate place for guides/examples to help with specific programs.