Fixed Vector.cpp

-Fixed and debugged
Vectors::Cross(initializer_list<Vectors::VectorData>) and
Vectors::Determinant(list<list<double>>)
-Changed overloaded >> and printw functions to inline and moved them to
header file
-Need to Transfer changes from Cross(initializer_list<VectorData>) to
Cross(initializer_list<initializer_list<double>>)