docs: Add Logging example README

[btlghrants]

closes #131

[jeff-mccoy]

quick ?, the asciicinema (sp?) shown is run via the expect script?

[btlghrants]

quick ?, the asciicinema (sp?) shown is run via the expect script?

Pretty much all of the logic for making recordings is held in there but that's not the thing that gets called initially, because:

• the expect scripts require certain tools/software to be installed (as in the runner VM @ docs/asciinema/Vagrantfile) (e.g. jq)
• the expect scripts aren't called directly; they're invoked by & require some args to be passed-in from the docs/asciinema/asciinema.sh "wrapper" script
• Most of the terminal settings, text coloring & waiting, along with the actual asciinema recording is done from inside the docs/asciinema/scenarios/*.exp scripts.

So, making a new recording (a.k.a. "running a scenario") actually gets kicked off by running a command like this (from within the asciinema VM):

cd <blah/blah/docs/asciinema>
./asciinema.sh run scenarios/examples-game-logging.exp

[jeff-mccoy]

/test all