Added parent tag pointer throughout call hierarchy.Cleaned up output hierarchy parameter names.

__mysql.h

@@ -12,7 +12,7 @@ namespace jet {
    class __mysql : public Tag {
 
     public:
-      __mysql(coreutils::ZString &in, coreutils::MString &parent, Global &global);
+      __mysql(coreutils::ZString &in, coreutils::MString &parentOut, Global &global, Tag *parent);
       ~__mysql();
 
       void query(coreutils::MString query);