Chat commands alwys start with `/mtimer` and then the player defines
what action to perform and adds a payload.
/mtimer help
/mtimer show
/mtimer set setting value
Issue: https://github.com/dsohler/mtimer/issues/1
Before all variables and “constants” (configuration variables) were
stored in one single global table. Now the players get custom attributes
set. This allows player-based displaying of the timer information.
This will be done in subsequent commits.
Tracking issue: https://github.com/dsohler/mtimer/issues/1
