openexr: also compile with 2.0
Added a missing space character in a user-visible message
Remove usarname and album labels to be consistent with the UI for the Picasa module
Avoid printing errors to the console if the data of the account is not json encoded
If there is any account defined, select the first one in the list. Fixes #9099
Add minor comment.
Minor code clean-up.
Properly free all XML documents.
Remove unused include files, minor code clean-up.

Conflicts:
	src/develop/lightroom.c
Use the same-type variable in a loop, as in loop condition

This fixes (most of the) warnings like this:
darktable/src/common/cache.c:382:17: warning: comparison of integers of different signs: 'int' and 'uint32_t' (aka 'unsigned int') [-Wsign-compare]
  for(int k=0; k<=cache->segment_mask; k++)
               ~^ ~~~~~~~~~~~~~~~~~~~

Conflicts:
	src/common/imageio_gm.c
	src/common/imageio_png.c
	src/common/imageio_tiff.c
	src/common/opencl.c
	src/develop/pixelpipe_hb.c
	src/imageio/format/j2k.c
	src/libs/collect.c