Rename utils to string.

src/main.cpp

@@ -24,7 +24,7 @@
 #include <algorithm>
 #include <iostream>
 #include <cstring>
-#include "utils.h"
+#include "string.h"
 #include "base58.h"
 #include "WIF.h"
 #include "ec.h"

src/string.cpp

@@ -23,7 +23,7 @@
  */
 #include <algorithm>
 #include <cctype>
-#include "utils.h"
+#include "string.h"
 
 std::vector<std::string> strsplit(const std::string& str, const std::string& delim) {
 

src/string.h

@@ -21,8 +21,8 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-#ifndef UTILS_H
-#define UTILS_H
+#ifndef STRING_H
+#define STRING_H
 
 #include <vector>
 #include <string>
@@ -35,4 +35,4 @@ std::string& rtrim(std::string& str);
 std::string& ltrim(std::string& str);
 std::string& trim(std::string& str);
 
-#endif /* UTILS_H */
+#endif /* STRING_H */