Moved Unsolved to it's own file

Headers/Problem.hpp

@@ -27,6 +27,7 @@
 #include <sstream>
 #include <string>
 #include "Stopwatch.hpp"
+#include "Unsolved.hpp"
 
 
 class Problem{
@@ -34,7 +35,6 @@ protected:
 	const std::string description;	//Holds the description of the problem
 	mee::Stopwatch timer;	//Used to determine your algorithm's run time
 	bool solved;	//Holds true after the problem has been solved
-	class Unsolved{};	//An exception class thrown if you try to access something before it has been solved
 public:
 	//Constructors
 	Problem() : solved(false){