Fix include loops guards

tapioca.hpp

-#ifndef AGGREGATION_H
-#define AGGREGATION_H
+#ifndef TAPIOCA_H
+#define TAPIOCA_H
 
 #define MASTER 0
 #define LATENCY 30
@@ -183,4 +183,4 @@ class Tapioca
   double startIOTime, endIOTime, totIOTime;
 };
 
-#endif /* AGGREGATION_H */
+#endif /* TAPIOCA_H */