Add config

[FichteFoll]

There is no configuration currently. Things to consider:

• [x] whether to show something in paused state
• [x] whether to show elapsed or remaining time (or none)
• [x] poll interval (?)
• [x] 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.