Add --filter-{start,end}-range
Add --filter-{start,end}-range

These are shorthands for --filter-start-from/--filter-start-to and
--filter-end-from/--filter-end-to.

Signed-off-by: Lukas Fleischer <af90e31281d8305af43dc616c5aaca3c7165f8a7@cryptocrack.de>

lfos/calcurse,lfos/calcurse,lfos/calcurse