Fix includes, add attribution headers, remove unused constructor

inc/graph.hpp

@@ -1,9 +1,14 @@
 
+#ifndef PROJECT2_GRAPH_HPP_INCLUDED
+#define PROJECT2_GRAPH_HPP_INCLUDED
+
+#include <string> // string
+#include <vector> // vector<int>, vector<vector<int>
+
 class graph {
 public:
    // Constructors
    graph() {}
-   graph(const int processes, const int resources);
    // Initializers:
    //   Read a graph from a file
    void read(std::string filename);
@@ -29,4 +34,6 @@ private:
    std::vector<int> resource_counts;
    struct m matrix; // Tell me, Mr. Anderson, what good is a phone call if you are unable to speak?
    bool is_blocked(int process_id);
-};
+};
+
+#endif