Added copy operators for game's static instance

Player
CommandParser can be swapped but not copied.

Engine/headers/CommandParser.h

@@ -22,6 +22,13 @@ public:
     std::vector<std::string> Verb(std::stringstream &sentences);
     std::vector<std::string> Noun(std::stringstream &sentences);
 
+    inline friend void swap(CommandParser& lhs, CommandParser& rhs)
+    {
+        using std::swap;
+        swap(lhs.commands, rhs.commands);
+    }
+
+
     static inline void CommandUnrecognized() { printf("I don't know how to do that.\n"); }
     int Parse();
 };