Build the calendar fields ourselves

[kokarn]

This PR makes us build the whole calendar ourselves instead of just copying from source.

It changes the name depending on teams, so if only one team is selected it uses that name. This closes #8

The output ics file is valid according to these validators http://severinghaus.org/projects/icv/ https://icalendar.org/validator.html

Example output hockey-mchockeyface.zip

[theseal]

Looks good. Just two things… 🙃

• I'm not sure about the default calendarName. Isn't "SHL matcher" really a single word? Is "SHL-matcher" better, or maybe just "SHL"?

• calendarDesc seems to include a typo.

[kokarn]

Both fixed :)

[theseal]

Great! Merge it is.