Feature request: Option to write orientation

It would be great if there was an option to write zenith and compass.

Example use cases:

Change initial orientation when viewing image in Theta viewer.
Creation of an environment for HDRI rendering. A popular format is .hdr, where you have a 32 bit equirectangular image. This can be created from a series of Theta shots, exposure bracketed. Challenge: The horizon needs to be leveled. The problem: Even when on a tripod, the Theta does not record exactly the same zenith and compass. Solution: Take zenith and compass from one image and use them for all images in the series.

regen100 / thetaexif