Add ATOMS_LOOP_RUNS option and statistics to stub variant

Signed-off-by: Rafael Ravedutti <rafaelravedutti@gmail.com>

src/includes/stats.h

@@ -31,6 +31,7 @@ typedef struct {
 } Stats;
 
 void initStats(Stats *s);
+void displayStatistics(Atom *atom, Parameter *param, Stats *stats, double *timer);
 
 #ifdef COMPUTE_STATS
 #   define addStat(stat, value)     stat += value;

src/includes/timers.h

@@ -0,0 +1,11 @@
+#ifndef __TIMERS_H_
+#define __TIMERS_H_
+
+typedef enum {
+    TOTAL = 0,
+    NEIGH,
+    FORCE,
+    NUMTIMER
+} timertype;
+
+#endif