Changed exception to Unsolved to fit with naming convention

Source/Problem1.cpp

@@ -78,7 +78,7 @@ void Problem1::reset(){
 std::string Problem1::getString() const{
 	//If the problem hasn't been solved throw an exception
 	if(!solved){
-		throw unsolved();
+		throw Unsolved();
 	}
 	//Create a string with the results and return it
 	std::stringstream results;
@@ -89,7 +89,7 @@ std::string Problem1::getString() const{
 uint64_t Problem1::getSum() const{
 	//If the prblem hasn't been solved throw an exception
 	if(!solved){
-		throw unsolved();
+		throw Unsolved();
 	}
 	return fullSum;
 }