Added namespaces to most classes, general cleanup

src/Evaluator/EvaluationException.hpp

@@ -7,18 +7,20 @@
 #include <string>
 using namespace std;
 
-class EvaluationException : public std::exception {
-    string _message;
-public:
-    explicit EvaluationException(string message){
-        _message = std::move(message);
-    }
+namespace Porygon::Evaluation {
+    class EvaluationException : public std::exception {
+        string _message;
+    public:
+        explicit EvaluationException(string message) {
+            _message = std::move(message);
+        }
 
-    const string defaultErrorText = "An evaluation exception occurred: ";
-    const char* what() const noexcept final{
-        return (defaultErrorText + _message).c_str();
-    }
-};
+        const string defaultErrorText = "An evaluation exception occurred: ";
 
+        const char *what() const noexcept final {
+            return (defaultErrorText + _message).c_str();
+        }
+    };
+}
 
 #endif //PORYGONLANG_EVALUATIONEXCEPTION_HPP