Fix memory leaks and proper deinitialization

include/openspace/rendering/renderabletrail.h

@@ -87,7 +87,7 @@ public:
 
 	//Vertex* _varray;
 	std::vector<float> _varray;
-	int* _iarray;
+	std::vector<int> _iarray;
 
 	//bool _once = false;
 	double lightTime;

include/openspace/rendering/stars/renderablestars.h

@@ -35,8 +35,9 @@
 namespace openspace {
 
 class RenderableStars : public Renderable {
-public: 
+public:
 	RenderableStars(const ghoul::Dictionary& dictionary);
+	~RenderableStars();
 
 	bool initialize() override;
 	bool deinitialize() override;

include/openspace/scripting/scriptengine.h

@@ -50,8 +50,9 @@ public:
 
 		bool operator<(const LuaLibrary& rhs) const;
     };
-    
+
     ScriptEngine();
+    ~ScriptEngine();
 
     bool initialize();
     void deinitialize();