-4. Add top-level message tables for all types so that we can link all
- records to a message and use the message's time stamp to (cascade)
- delete old data.
+ * AutoRacingGridXML
+ * CBASK_Individual_Stats_XML
+ * Cbask_Roster_XML
+ * cbaskteamschedulexml
+ * CBATeamScheduleXML
+ * CFLTeamScheduleXML
+ * CFLTotalTeamScheduleXML
+ * Minor_Baseball_TeamScheduleXML
+ * MinorLeagueHockeyTeamScheduleXML
+ * MLB_Boxscore_XML
+ * MLB_IndividualStats_XML
+ * MLB_Probable_Pitchers_XML
+ * MLB_Roster_XML
+ * mlbteamschedulexml
+ * mlsteamschedulexml
+ * NBA_Boxscore_XML
+ * NBA_Individual_Stats_XML
+ * NBA_Roster_XML
+ * nbateamschedulexml
+ * NCAA_Basketball_Boxscore_XML
+ * NCAA_FB_TeamScheduleXML
+ * NCAAHockeyTeamScheduleXML
+ * NFL_Boxscore_XML
+ * NFL_CompBox_XML
+ * nfldepthchartxml
+ * nflteamschedulexml
+ * nhlteamschedulexml
+ * WCBaskTeamScheduleXML
+ * WNBA_Boxscore_XML
+ * WNBA_Individual_Stats_XML
+ * WNBATeamScheduleXML