Refactor MxHashTable/MxVariableTable (#283)

* Refactor MxHashTable/MxVariableTable

* Use MxS8 for Compare return type

* Cursor::DeleteMatch check and clang fix

LEGO1/mxcollection.h

@@ -0,0 +1,25 @@
+#ifndef MXCOLLECTION_H
+#define MXCOLLECTION_H
+
+#include "mxcore.h"
+
+template <class T>
+class MxCollection : public MxCore {
+public:
+	MxCollection()
+	{
+		m_count = 0;
+		m_customDestructor = Destroy;
+	}
+
+	virtual ~MxCollection() {}
+
+	static void Destroy(T){};
+	virtual MxS8 Compare(T, T) { return 0; }
+
+protected:
+	MxU32 m_count;                 // +0x8
+	void (*m_customDestructor)(T); // +0xc
+};
+
+#endif // MXCOLLECTION_H