Remarkable V3.3 partial compatibility

This release adds partial support for the reMarkable 3.3 update.
New documents with text added will not be imported correctly, the format has not been fully decoded yet.

This is not a stable release and needs further testing, but I wanted to get this out for people with interest.

URL fix

This is a temporary fix release because https://github.com/jamesf91/reMarkableSync seems not active at the moment.