add pmtiles-show

python/bin/pmtiles-show

@@ -0,0 +1,15 @@
+#!/usr/bin/env python
+
+import sys
+from pmtiles.reader import read
+
+if len(sys.argv) <= 1:
+    print("Usage: pmtiles-show PMTILES_FILE")
+    exit(1)
+
+with read(sys.argv[1]) as reader:
+    print('spec version: ',reader.version)
+    print('metadata:')
+    for k, v in reader.metadata.items():
+        print(k,'=',v)
+    print('root entries:', reader.root_entries)