Merge pull request intake#68 from ondrejhlavacek/najlos-traceback

do not display traceback when used in CLI

Author: martindurant

snappy/__main__.py

@@ -86,4 +86,7 @@ def cmdline_main():
 
 
 if __name__ == "__main__":
-    cmdline_main()
+    try:
+        cmdline_main()
+    except Exception as err:
+        sys.exit("%s: %s" % (err.__class__.__name__, err))