avoid warning on broken gcc compilers

gcc 4.3 complains about
yuck-scmver.c:485: warning: operation on 'bp' may be undefined

Unfortunately rpmlint on OBS does not like this and it's hard to fix
this for all projects using yuck.
chore, import new intern system, courtesy of glod

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
chore, zap yuck to latest
chore, zap to latest clitoris
minor, allow time-series file to be `-' (for stdin)
chore, update instant system (from latest echse)
test, provide regression cases for caevs applied to intraday time series
fix, turn all date-only stamps into real date/times upon popping for apply