Added Ruby to conformance tests.

Change-Id: If7b1cc0f03f609a7f43ddafc8509b44207c60910

Change-Id: Id008ebac5159f773e1bde8b85acb2626cbd16de8

Addming missing includes in stubs headers.

This is to prepare removing those additional headers in common.h

Change-Id: I707d6d8eaf193eb28195a827c7fec738b968ab3e

Split up common.h headers

ignore UTF-8 BOM

Change-Id: I75459b8b6562c3ac58fa4b1e4513accdda43ad64

Change-Id: I5f6cbc2430200e3751ad754cc7ae604338db6f91

Change-Id: Ifbc415755266ba3d0ffa5661fcd7c7d2e3b32a22

Change-Id: I223783111d743aa5193bf70fa1b9b54c7b4389c3

This involved fixing a few important bugs in the
Ruby implementation -- mostly cases of mixing
upb field types and descriptor types (upb field
types do not distinguish between int/sint/fixed/sfixed
like descriptor types do).

Also added protobuf-specific exceptions so parse
errors can be caught specifically.

Change-Id: Ib49d3db976900b2c6f3455c8b88af52cfb86e036

Install google/protobuf/stubs/status.h, and google/protobuf/stubs/stringpiece.h -- these are required in order to include google/protobuf/util/type_resolver.h.

Install google/protobuf/stubs/bytestream.h -- this is required in order to include google/protobuf/util/json_util.h.

remove pbconfig from extract script

Change-Id: I5049da7449cbada781aa1e23485a336b584802cb

Added support for JSON and valid input to conformance tests.

This was enabled by the recent open-sourcing of JSON
support and MessageDifferencer.

MessageDifferencer allows the conformance suite to expand
because it allows us to write tests for payloads that parse
successfully.  To verify the testee's output payload, we
need to parse it back into a message and compare the message
instances.  Comparing output bytes vs. a golden message is
*not* valid, because protobufs do not have a canonical
encoding (especially in the presence of maps, which have
no prescribed serialization order).

We only add one small JSON test for now, but with the
framework in place we now have the foundation to dramatically
expand the coverage of the conformance test suite.

Also added the ability for the testee to skip tests that
exercise features that are unimplemented.  This allows
Java (which currently has no JSON support) to skip tests
involving JSON.

Change-Id: I697b4363da432b61ae3b638b4287c4cda1af4deb

Internal local modifications.

Worked around memory leak bug in Ruby interpreter.

Change-Id: I8e2b425f9008e6b82d41d59783bb8b04af1f886f
Fixes: https://github.com/google/protobuf/issues/474.

Add Bazel target for the Objective-C protobuf runtime

Also add WKT headers to the umbrella file, and simplify Podspec with it.
Plus some layout improvements to the BUILD file.

Implement parsing for proto3 primitive repeated fields.

MinGW64+MSYS2 compilation issues

Delete default UnknownFieldSet when shuting down.

Fix "sometimes-uninitialized" warning on Windows Clang.

fix compiler warnings.

Enable tests for bazel build.

- control reaches end of non-void function.
- remove a deprecated IsMatch.

Change-Id: Ifdeb15879bbcf591c48dc7fda1cd8994bdf87bb3

fix typo in cmake/README.md

Update upb to fix two bugs in the Ruby library.

Fixes:
  https://github.com/google/protobuf/issues/502
  https://github.com/google/protobuf/issues/425

Add nonnull/nullable/null_resettable markup to ObjC library.

Change-Id: I63ed5fb58a45e098f2fd1fa457a219148de030bd