Convert stdout messages to log messages

[oubiwann]

Tasks:

• [x] Select log library
• [x] Review all code and replace message with logs

[oubiwann]

I've done this, using the logjam library ... but, for whatever reason, logjam's not running in an OTP release 😢

I'm not able to load the 'logjam.hrl' include file:

===> Compiling apps/lmud/src/lmud-player.lfe failed
/Users/oubiwann/lab/lfe/lmud/apps/lmud/src/lmud-player.lfe:6: can't find include lib logjam/include/logjam.hrl

This is with the following in the lmud rebar.config:

{lfe_opts, [
   {i,"_build/default/lib"},
   {i, "./apps"}
]}.

[oubiwann]

Ah, I was doing compile and release in a single rebar3 do command; when I broke them into separate shell commands, it worked.

[oubiwann]

Done.