Works now as desired.

updated some things like:
- adjusted fonts
- small changes to the layout
- added stationboard table headers
- now a connection is only displayed once
- results are now sorted by departure time 

The next final steps are:
- refine layout and look & feel
- clean up code
- try to make the result fetching more performant (now, there are like 100 loops)
- add settings panel (via PebbleJS)
- enable pebble to request a new fetch (e. g. when a displayed entry has already expired, or maybe when the user for example shakes his wrist [so to speak a "refresh button"])
- let the user set his favorite connections (maybe also for particular day times)
- etc...