Merge Structures

Recursively merges fields and subfiels of two structures.

% Simple recursive algorithm merges fields and subfields of two structures
% Example:
% A.field1=1;
% A.field2.subfield1=1;
% A.field2.subfield2=2;
%
% B.field1=1;
% B.field2.subfield1=10;
% B.field2.subfield3=30;
% B.field3.subfield1=1;
%
% C=mergestruct(A,B);
%