Method free

src/common/classes/array.h:423–429

clear array and release dinamically allocated memory

	// clear array and release dinamically allocated memory
	void free()
	{
		clear();
		freeData();
		capacity = this->getStorageSize();
		data = this->getStorage();
	}

	// This method only assigns "pos" if the element is found.
	// Maybe we should modify it to iterate directy with "pos".