Extract heading (=Direction of image) from Exif/metadata and add it to location template

[Aschroet]

Analogous to https://phabricator.wikimedia.org/T39925 it would be nice if the commonist would also include the heading into the location template if available in Exif.

[ritschwumm]

do you have a test image for me where this field is set?

[Aschroet]

Of course. Here you are.

[ritschwumm]

cool, i can get the heading from this. have to think a bit about the gui, though.

[ritschwumm]

implementation is finished and seems to be working - i'll test and upload soon(ish).