Merge branch 'pr580'
smileys/cylgom: add some unicode
Merge branch 'pr582'
Windows: Save data in %APPDATA%/tox/ as per the STS

Fixes #585
update russian translation
Removed untranslatable strings
Merge branch 'pr587'
Merge branch 'pr567'
translations/ru: release
Merge branch 'pr589'
fix jenkins git issue
add logging to file; should make bug reports easier to handle
(it's a bit of a hack, but it works)
remove a couple of debug statements
fix git_version issue without git
fix sodium cloning
Merge branch 'pr593'
proper sending/receiving group actions
Merge branch 'pr595'
Fix #591
Fix crash on exit

Static destructors were being called in an inconvenient order, replace that with a pointer and check for nullity