support stdin/stdout for sign/verify
support stdin/stdout for sign/verify

svn path=/trunk/kdesupport/qca/; revision=635014

karolherbst/qca,highfidelity/qca,JoshuaKolden/qca,sladage/qca,KDE/qca,highfidelity/qca,JoshuaKolden/qca,KDE/qca,highfidelity/qca,sladage/qca,oktavarium/qca,oktavarium/qca,KDE/qca,Esf-Software/qca,Bjoe/qca,highfidelity/qca,karolherbst/qca,karolherbst/qca,Esf-Software/qca,KDE/qca,JoshuaKolden/qca,oktavarium/qca,Bjoe/qca,karolherbst/qca,Bjoe/qca,Esf-Software/qca,Bjoe/qca,oktavarium/qca,JoshuaKolden/qca,Esf-Software/qca,sladage/qca,sladage/qca