Document append_to_resp_body
Document append_to_resp_body

All other response body related functions use _resp_ not _response_ so
having _response_ in one place is confusing.

chef/webmachine,kellymclaughlin/webmachine,agx/webmachine,lemenkov/webmachine,lemenkov/webmachine,Webmachine/webmachine,sdebnath/webmachine,kellymclaughlin/webmachine,basho/webmachine,campanja/webmachine,campanja/webmachine,agx/webmachine,riak-synrc/webmachine,joedevivo/webmachine,liuhongchao/webmachine,tsloughter/webmachine,joedevivo/webmachine,tsloughter/webmachine,basho/webmachine,joedevivo/webmachine,chef/webmachine,sdebnath/webmachine,liuhongchao/webmachine,riak-synrc/webmachine,Webmachine/webmachine,riak-synrc/webmachine