bump version info and add compile info to version

XD.c

@@ -1,8 +1,8 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #ifdef ERR
 #include <stdarg.h>
-#include <string.h>
 #endif
 
 #ifdef GIT
@@ -155,9 +155,17 @@ has_staged(git_repository *repo)
 int
 main(int argc, char *argv[])
 {
-  int code = -1;
+  int i, code = -1;
   char face[] = { ':', 0, '|' };
 
+  /* print version information */
+  for (i = 1; i < argc; i++) {
+    if (strcmp(argv[i], "-v") == 0) {
+      printf("XD v%s\n", VERSION);
+      return 0;
+    }
+  }
+
   #ifdef GIT
   git_repository *repo;
   int git_ok = 0;