Initialize mutex

Remove a major source of contention in thread_pool

Prevent a potential deadlock

Build cleaner updates

Fix some memory leaks

Migrate the last of the Python code from Google-internal source control to git.

The source code is moved from src/python to
src/python/src. A setup.py is added at
src/python. The build_python.sh and
run_python.sh scripts are updated to build
and run the Python tests by building a
package and installing it in the developer's
Python 2.7 virtual environment.

And make it easy not to make the same mistake

- notify_one when new work is available to avoid thundering herd
  problems
- checking conditions before entering cv_.wait() prevents a case that
  these are not validated

Fix some typos

Add pprof support to qps client, server

Starts profiling on client and server.
On client, finishes after a test.
On the server, finishes after sigint.

Adding an editorconfig configuration file.

Resolves a deadlock caused by flow control callbacks being made under the lock.

Check http://editorconfig.org/ for more information.

Updated PHP library to handle generated code without explicit references to grpc

Added handling for unimplemeneted methods on the server

Added stock service client and server

Make ASAN work to detect leaks

Fix a couple of PHP bugs that prevented the PHP interop test client from working

Refactor the code a little to make this easier to munge around.

Fix initialization compile error

Switched extension to return faster sliceable Buffers

Adding property sheets for OpenSSL and Winsock 2 libraries.

Fixing echo test.