Changes to Return Value of documents.remove

The method DatabaseClient.documents.remove previously returned an object with both a "uri" property and a "uris" property that served the same purpose. The "uri" property has been removed. The return value now has the following form:

{ "uris":[uri1, uri2, ...], "removed":true }

The value of the "uris" property is now always an array. Previously, if you passed in just a single string as input, remove returned just the URI string, rather than an array of one item.