Moved trek completeness fields to setting  (fixes #967)
Add detail about update with make deploy in settings.ini
Fix regression about source locale messages (fixes #970, ref #704)

Conflicts:

	CHANGES
	Makefile
Fix regression link  lost from adminsite (fixes #971)
Serve uploaded files as attachments (fixes #972)
Remove help texts being shown from filter forms (fixes #966)
Fix form pills for translated languages (fixes #968)
Fix tests
Merge pull request #973 from makinacorpus/various_fixes_v0.22

Various fixes v0.22