Addressed a roscpp compatiblity issue.
Addressed a roscpp compatiblity issue.

Added an explicit Content-Length to XML-RPC methodResponse
responses. In Snap, this turns off Chunked responses.

bitemyapp/roshask,rgleichman/roshask,acowley/roshask,estump/roshask,rgleichman/roshask,bitemyapp/roshask,acowley/roshask,aa755/roshask,akru/roshask,estump/roshask,akru/roshask,aa755/roshask