Update documentation to include date range "hebcal" API?

I'm putting together a page that will show the Parsha hashavua and specific times for a given Hebrew year. 

The hebcal.com/hebcal? API will give me the Shabbat dates for a year, but only (as far as I can see) a Gregorian year. 

I tested out the &start= and &end= option which is documented in the hebcal.com/zmanim page, and found it works. 

The fact that it works is lovely. The fact that it's not described on the hebal.com/hebcal page is perhaps less lovely. I'm willing to pitch in and help with the documentation if that helps.