Minor edit in customer_accounts

Customer accounts API was specifying that customer_accounts get request would return the only customer account for current user. There are multiple customer accounts, potentially, for each user, so changed this specification accordingly.
Finishes get request specification for single watch list

Includes request URL, list of returned attributes, and example of XML response.
Finishes get request specification for watch lists index
Finishes get request specification for watch list create
Finishes get request specification for watch list update and destroy