created dir.c & .h, improved header file handling

interactions.c

@@ -1,15 +1,11 @@
 #include <curses.h>
 #include <pthread.h>
 #include <dirent.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <strings.h>
-#include <signal.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <string.h>
+
+#include "file_previews.h"
+#include "backend.h"
 #include "defines.h"
-#include "config.h" 
+#include "config.h"
 
 
 extern volatile unsigned long selected_file_current;
@@ -55,7 +51,6 @@ void FAIL(char *function, char *str){
 	curs_set(1);
 	echo();
 	printf("ERROR in function %s: %s", function, str);
-	kill(getpid(),9);
 }
 void user_interactions() {