Improve the documentation for the API hook: hook_commerce_customer_profile_type_info.

The descriptions for the 'help' and 'description' parameters in hook_commerce_customer_profile_type_info could be more clear. I had to go digging in the commerce code to figure out what the 'help' text was actually used for. Turns out it is passed to hook_help, but that is not clear from the description of the field.

Here is a patch to update the text to add a few more details. You don't have to use my text, but it would be handy if some additional context was added as to how one can display these features.