Reorganize src/python.

Run test server locally

Regenerating project files and massaging VS project files.

This is in preparation of moving all tests into a separate package to
enable ease of coverage checking and testing.

Move grpc_census_call_*_context calls into public header

Python documentation generation.

Reconnect with jitter.

Make ruby tests see changes to C core

Update interop test descriptions.

Reconnect interop spec

make accessors from get_x() to x()

Tune down number of channels for qps_test

Make insecure channel/stub construction explicit

Server side census context plumbing for c++

Fix clock type mismatch

adding one more prepare command to mirror repositories.

fix build