Added widgets.utils.colorpalette with some fixes for Py 3 and Qt 4
Added widgets.utils.colorpalette with some fixes for Py 3 and Qt 4

cheral/orange3,kwikadi/orange3,qPCR4vir/orange3,kwikadi/orange3,qusp/orange3,qusp/orange3,kwikadi/orange3,qusp/orange3,qPCR4vir/orange3,marinkaz/orange3,cheral/orange3,marinkaz/orange3,marinkaz/orange3,marinkaz/orange3,qPCR4vir/orange3,cheral/orange3,qPCR4vir/orange3,qusp/orange3,cheral/orange3,qPCR4vir/orange3,qPCR4vir/orange3,kwikadi/orange3,marinkaz/orange3,kwikadi/orange3,cheral/orange3,kwikadi/orange3,cheral/orange3,marinkaz/orange3