Merge pull request #941 from uber/redirect-hook

Add endpointName in redirect function arguments

Merge pull request #940 from uber/redirect-hook

Add hook for redirect function in ServeHTTP

Merge pull request #938 from ChenX1993/version-2-tracing

Standardize tracing span tags with proper error annotation

add yarpc middleware to capture grpc

Merge pull request #935 from uber/altServiceName

Fix capture service name to accommodate alternate service detail

Merge pull request #933 from uber/eventContainer

Event container export field

Merge pull request #929 from uber/grpcOutgoingEvent

grpc outgoing event

Merge pull request #925 from uber/tChannelCallStatus

Add request status in tchannel event capture

Creating new tag

Create correct tag#