[development] update node_example.module to use schema api

[Jon Saints]

I notice that the file node_example.module on
http://api.drupal.org/api/file/developer/examples/node_example.module
has not been upgraded to show how to use the schema api.

I am interested in updating this page, which has been so helpful to
me, to include a hook_schema implementation and some
drupal_write_record calls.

How and where is this documentation stored? What is the best way for
me to make my proposed changes so they can be reviewed by the
community and maintainer?

Thanks
Jon