getOrderbook - return raw order data (#886)

Fix #799

docs/src/getOrderbook.md.ejs

@@ -14,6 +14,12 @@ This method returns a promise that resolves with an object with the following st
 
 <%- renderSchema('output/get-orderbook.json') %>
 
+### New in ripple-lib 0.22.0 and higher
+
+The response includes a `data` property containing the raw order data. This may include `owner_funds`, `Flags`, and other fields.
+
+For details, see the rippled method [book_offers](https://ripple.com/build/rippled-apis/#book-offers).
+
 ### Example
 
 ```javascript