Resolve "Renaming accoding to WOLF conventions"

Closes #5 (closed)

include/gnss_utils/utils/utils.h

-#ifndef UTILS_H
-#define UTILS_H
+#ifndef INCLUDE_GNSS_UTILS_UTILS_UTILS_H_
+#define INCLUDE_GNSS_UTILS_UTILS_UTILS_H_
 
 #include <vector>
 #include <iostream>
@@ -42,4 +42,4 @@ bool equalObservations(const obs_t& obs1, const obs_t& obs2);
 
 }  // namespace GnssUtils
 
-#endif
\ No newline at end of file
+#endif // INCLUDE_GNSS_UTILS_UTILS_UTILS_H_
\ No newline at end of file