error format is changing

The error format is changing, need to ensure that's updated in the client.

Rough example format:

{"total_rows":0,"rows":[

],
"errors": [{"from":"127.0.0.1:5984","reason":"Design document `_design/testfoobar` missing in database `test_db_b`."},
{"from":"http://localhost:5984/_view_merge/","reason":"Design document `_design/testfoobar` missing in database `test_db_c`."}]}