Add diner registration to own calendar

[Kipjr]

Oi, ideetje. Ik eet vandaag mee en zet in mijn agenda ;)

Update Feb 2018:
Here's a new link structure that seems to support the new google version of google calendar w/o requiring API interaction:

https://calendar.google.com/calendar/r/eventedit?text=My+Custom+Event&dates=20180512T230000Z/20180513T030000Z&details=For+details,+link+here:+https://example.com/tickets-43251101208&location=Garage+Boston+-+20+Linden+Street+-+Allston,+MA+02134

New base url: https://calendar.google.com/calendar/r/eventedit

New parameters:

text (name of the event)
dates (ISO date format, startdate/enddate - must have both start and end time)
an event w/ start/end times: 20131208T160000/20131208T180000
all day events, you can use 20131208/20131209 - end date must be +1 day to whatever you want the end date to be.
ctz (timezone such as America/New_York - leave blank to use the user's default timezone. Highly recommended to include this in almost all situations. For example, a reminder for a video conference: if three people in different timezones clicked this link and set a reminder for their "own" Tuesday at 10:00am, this would not work out well.)
details (url encoded event description/details)
location (url encoded location of the event - make sure it's an address google maps can read easily)
Notes:

the old url structure above now redirects here
supports https
deals w/ timezones better
accepts + for space in addition to %20 (urlencode vs rawurlencode in php - both work)