Add XnConvert

[dnet890]

XnConvert is good image converter They have a deb available from their website. https://download.xnview.com/XnConvert-linux-x64.deb

[flexiondotorg]

Sorry, we are only accepting software that provides a reliable way to dynamically determine the current published version. Please see:

• Add guidelines for what packages are acceptable for inclusion

[falko]

@flexiondotorg XnConvert's own update check uses this machine-readable file: https://www.xnview.com/update.txt That should get us going, right? Can you please re-open the issue?

[philclifford]

something like

VERSION_PUBLISHED=$(wget https://www.xnview.com/update.txt -q -O- |grep -A1 'XnView]'| grep version | cut -d= -f2)
#  2.52.2
VERSION_PUBLISHED=$(wget https://www.xnview.com/update.txt -q -O- |grep -A1 'XnConvert]'| grep version | cut -d= -f2)
# 1.10