Add config

[FichteFoll]

There is no configuration currently. Things to consider:

• whether to show something in paused state
• whether to show elapsed or remaining time (or none)
• poll interval (?)
• players to ignore

[FichteFoll]

Configuration with per-player overrides and most options have been added for 0.2.0.

I'll take a look at a few reasonable (and light-weight) templating engines, or may need to write something on my own at a later time.