Implements variable usage, tweaks and fixes for variable assignment

src/Script.cpp

@@ -28,7 +28,7 @@ Script::~Script() {
     delete this -> BoundScript;
     delete this -> _lastValue;
     delete this -> _evaluator;
-    for (auto v : *this -> _scriptVariables){
+    for (auto v : *this->_scriptVariables){
         delete v.second;
     }
     this->_scriptVariables->clear();