Bump python protobuf dependency to 3.0.0

Let override default response size limit

Backport of "added windows to INSTALL.md"

added windows to INSTALL.md

Downgrade docker setuptools

Update .NET core dependencies to RTM

Bumping to 1.0.0-pre2.

PHP: missed a macro

Not after :) This fixes the local server tests failing to SSL handshake.

Build the Node health-check package in the build_packages script

update to use new nuget client in tests

backport #7502 from dgquintas/cpp_compression_level

Still missing: Catch the C-library error to improve the error message.

C++ Compression Level set properly

Ruby Tools: automatically include plugin argument in protoc command

PHP: cleanup for GA

PHP: use php7_wrapper to reduce duplicated codes on v1.0.x branch(final part)

Remove .rb suffix from grpc-tools scripts, to be consistent with other gems