new style for symeig

I rewrote symeig with the new alglin style.
Does that fit ?
Have I missed something ?

   symeig can be called:
    w = symeig(a)
    w = symeig(a, matrix_/vector_/'U'/'L')
    w = symeig(a, matrix_/vector_, 'U'/'L')
    [w, v] = symeig(a)
    [w, v] = symeig(a, matrix_/vector_/'U'/'L')
   [w, v] = symeig(a, matrix_/vector_, 'U'/'L')
   w will contain the eigenvalues which are real in vector_ or diagonal matrix_ form
   v will contain the eigenvectors in a matrix of element of the same type as the input