better sample config

example.hcl

@@ -1,3 +1,15 @@
-user = 89056200
+#
+# kleingebaeck sample configuration file.
+# put this to ~/.kleingebaeck.hcl.
+#
+# Comments start with the '#' character.
+
+# kleinanzeigen.de user-id. must be an unquoted number
+user = 00000000
+
+# enable verbose output (same as -v), may be true or false.
 verbose = true
+
+# directory where  to store downloaded  ads. kleingebaeck will  try to
+# create it. must be a quoted string.
 outdir = "test"