Response struct for Tables

[gbrebner]

Whether the response struct for Tables should always begin with a standard bit indicating hit/miss, or whether an extra Table attribute should indicate whether or not there is such a bit. In addition, whether hit/miss is enough or whether a hit count would be more useful.

[gbrebner]

This is related to the question of how Tables support default actions expressed in HLLs, such actions being triggered by a miss.