Make the timetable and the departures table somewhat more styleable

[AdamNaj]

Love the integration! In order to integrate it with my wall tablet dashboard I needed to style it a little bit more than it was possible before. All I really did was adding some additional spans around the texts.

I've modified the examples to reflect the previous style for the regular html-card and made some creative use of the new styles in the html-template-card. If you like the result, I'd love to contribute to your great work.

[Borales]

@AdamNaj thanks for the idea.
I made a custom helper template that generates a required HTML (to my preferences) based on the original sensor updates, including some post-formatting things:

• proper functions to format the time from "120m" to "2h"
• "font-weight: bold" for trams departing within the next 15 min (I even had them blinking, but it was too distracting)

Now it's way more convenient than the original (also for a NSPanel Pro that I'll be mounting on a wall).