uses elm cnp to store the image in a selection attached to your
compositor elm win. note... some apps are fussy about what file
formats they accept... we've found through much pain that chrome (and
i assume anything based on it like electron) only accept png for cnp.
firefox accepts most sane formats (png, jpg). libreoffice too accepts
png and jpg, efl accept sjust anout anything you throw at it, so ymmv.
if paste doesnt work either the target for paste doesn't support
pasting images at all or it is fussy about formats - maybe set quality
to 100% to force png and try that as shot saves just png and jpg
(100% quality == png, evrything below is jpg).
if you want pastes of lower quality to work e.g. jpegs in chrome -
file a bug with the chrome team... :)
this gets rid of that annoying freeze in e due to the sync save and
possibly sync dns lookups in curl. slave binary handles it now and
talks back to e via stdout.
this also splits up the code into more files for specific purposes to
make it easier to add features to and maintain. given on the todo is
the ability to explicitly select a crop region and do some basic
"drawing" too, this sets the stage for that and it made it easier to
do the above upload/save tool.