make deleted functions public

Make deleted functions (copy constructor and assignment operator)
public, because preserving them private hides the original intention.

Issue: saebyn#27
Signed-off-by: Gluttton <gluttton@ukr.net>

Author: Gluttton

src/munkres-cpp/munkres.h

@@ -45,10 +45,10 @@ class Munkres
 {
     public:
         Munkres (M<T> &);
-
-    private:
         Munkres (const Munkres &) = delete;
         Munkres & operator = (const Munkres &) = delete;
+
+    private:
         bool find_uncovered_in_matrix (size_t &, size_t &) const;
         int step1 ();
         int step2 ();