ported nested if-else conditional patch to mutt-kz (credit to David Champion <dgc>)
ported date conditional patch to mutt-kz (credit to Aaron Schrab <ats>)
changed date conditional comparisons
now d = yesterday, w = last week, m = last month, y = last year, H = last hour, etc from current time
Merge branch 'master' of https://github.com/insanum/mutt-kz