Include a creator field in tileset metadata with the Tippecanoe version

Also finally eradicates binary diffs from the tests

mbtiles.cpp

@@ -17,6 +17,7 @@
 #include "text.hpp"
 #include "milo/dtoa_milo.h"
 #include "write_json.hpp"
+#include "version.hpp"
 
 sqlite3 *mbtiles_open(char *dbname, char **argv, int forcetable) {
 	sqlite3 *outdb;
@@ -371,6 +372,15 @@ void mbtiles_write_metadata(sqlite3 *outdb, const char *outdir, const char *fnam
 	}
 	sqlite3_free(sql);
 
+	sql = sqlite3_mprintf("INSERT INTO metadata (name, value) VALUES ('creator', %Q);", VERSION);
+	if (sqlite3_exec(db, sql, NULL, NULL, &err) != SQLITE_OK) {
+		fprintf(stderr, "set type: %s\n", err);
+		if (!forcetable) {
+			exit(EXIT_FAILURE);
+		}
+	}
+	sqlite3_free(sql);
+
 	if (vector) {
 		size_t elements = 100;
 		std::string buf;