Made AEntry TableData public

Incremental un-use of TableData getter should be done in the future if public data is to stay.

src/experimental/aentry.h

@@ -42,6 +42,7 @@ namespace experimental {
 class AEntry {
 protected:
     DataPosition position;
+public:
     TableData tableData;
 public:
     AEntry() = delete; // Demand specificity from default constructor