SortLib: SObject::Is(uint) method has been changed for more type masks can be supported

EnLos: EnLosInTarget class header has been changed though is still commented
SortLib: SoBinaryOperator class created and used in SortProject::GetBinary(QString,double,double)
SortLib: SoTableOfTables - class which provides user defined binary operator as an interpolation of unary operators.
DOC: information about new features added.