This makes possible to build grpc_php_plugin with protobuf in shared mode.

Don't assume Windows builds use MSVC.

Updated Ruby conformance test failure list

Added missing .inc files to BUILD

This commit adds two entries to the conformance failure list for Ruby.
It seems that these particular test cases have been failing since they
were introduced in 5140bae3, so there
has not been any regression.

This fixes the Bazel build.

Add performance.md and add instruction for linking tcmalloc

Removed some unused C++ source files

Switch to using the MSVC options, not based on the cpu, but based
on the compiler name. This allows building on Windows with MSYS
or MinGW's gcc.

Integrated internal changes from Google

Add go benchmark

Allow null value in JSON representation of ListValue

We need to use a new enough version to ensure that constexpr is
available.

Pre-5.1.0 versions of GCC do not support these particular type traits
(see https://github.com/google/protobuf/issues/417).

Cat the test-suite.log on errors for presubmits

Fix spelling error of __GNUC_MINOR__

Objective-C: Check return value on write of raw pointer

Remove 64MB memory limit when deserializing messages in C#

Support using MSVC intrinsics in Log2FloorNonZero

We no longer need this, now that we have finished the switch to C++11
and are using std::unique_ptr.

Revert "Removed mention of Buffer in byteSourceToUint8Array"

Ruby: Fix scope resolution for MessageExts