Fix GPR_TIMER misbalancing

Basic testing of client and sever side compression for Python

Moved grpc_shutdown to end of Py_Finalize()

Pass NULL in the host parameter of grpc_channel_create_call

Fix clang formatting

New epoll based polling implementation

Fix #3803

Re-enable accidentally disabled traces

Fix build error of SwiftSample project on Xcode 7.3 (Swift 2.2)

Modified route_guide sample app to show RPC log

Update master branch to 0.16.0-dev

We currently rely on the __del__ method of a module scope object
to call grpc_shutdown().  __del__ methods are not guaranteed
to be called, and furthermore there are no guarantees about
ordering, leading to shutdown race conditions.  This moves
grpc_shutdown to Py_Finalize(), which gets called after the
Python context is completely cleaned up.

Allow Node users to set a custom logger and log verbosity.

Doc Fixit: Ordering and thread-safety for C++ streaming (sync/async) APIs

Fix C# nuget build (and all distribtests)

Fix build node package

Prevent race with grpc_completion_queue_shutdown.

gpr_refcount

Use GRPC_PYTHON_CFLAGS/GRPC_PYTHON_LDFLAGS in setup.py.

Changed %lld to use mingw supported PRId64

Brought compression spec up to date wrt error statuses

To Implementation

This is needed for building grpcio with mingw, see
https://github.com/grpc/grpc/pull/7012.

Remove generated NewClient factory method for C#.

TODO for removing boilerplate code