Large overhaul of pointers to shared_ptrs, implemented function evaluation

src/Evaluator/EvalValues/StringEvalValue.hpp

@@ -9,17 +9,14 @@ using namespace std;
 
 class StringEvalValue : public EvalValue{
     string _value;
-    ScriptType* _type;
+    std::shared_ptr<ScriptType> _type;
 public:
     explicit StringEvalValue(string s){
         _value = move(s);
-        _type = new ScriptType(TypeClass::String);
-    }
-    ~StringEvalValue() final{
-        delete _type;
+        _type = std::make_shared<ScriptType>(TypeClass::String);
     }
 
-    ScriptType* GetType() final{
+    std::shared_ptr<ScriptType> GetType() final{
         return _type;
     };
     bool operator ==(EvalValue* b) final{