embedded google maps get transformed into broken calendar shortcodes

[btb]

The uw_google_calendar_embed_to_shortcode() function is supposed to convert a google calendar iframe into a shortcode, but it actually attempts to transform any content that contains either an iframe tag or a link to google.com/calendar.

The regex will succeed on any google url, so for example this map embed:

<iframe src="https://www.google.com/maps/d/embed?mid=1k7y_cvcBbZQlqZ-mTiz1JpFQ53J9cyCk" width="640" height="480"></iframe>

gets transformed into

[googleapps domain="www" dir="calendar/embed" query="mid=1k7y_cvcBbZQlqZ-mTiz1JpFQ53J9cyCk" width="630" height="480"]

which doesn't work. #164 should fix the problem

[lcaple]

This is be added in the next release. Thank you!