Google.Protobuf should target net45 (upport to upstream/master)

fix protobuf_generate function

Add bazel support for examples.

This addressbook.proto now belongs to its own bazel pacakge and can't be
accessed in bazel protobuf_test target.

The example utilizes native bazel rules (proto_library, cc_proto_library,
java_proto_library, java_lite_proto_library) to show how easy it is to
build protobuf with bazel's native support. It also makes use of well
known types which was not possible until the latest bazel 0.5.4 release
and https://github.com/google/protobuf/pull/3594 .

python: do not include internal 'strutil.h' header

Update autogen.sh

bazel: Add proto_library rules for well known types. Fixes #2763

Adds a proto_library rule for each well known type proto:

$ bazel query "filter(\".*_proto$\", \"...\")"
//:wrappers_proto
//:timestamp_proto
//:struct_proto
//:field_mask_proto
//:empty_proto
//:duration_proto
//:compiler_plugin_proto
//:descriptor_proto
//:api_proto
//:type_proto
//:source_context_proto
//:any_proto

Bazel users can reference these proto_library rules for their own
language specific rules i.e.

java_proto_library(
  name = "any_java_proto",
  deps = ["@com_google_protobuf//:any_proto"],
)

Also set the workspace name to "com_google_protobuf", as proto_library
rules reference protobuf that way.

Fix the bug in following scenario:  

gmock is downloaded successfully while gtest not. Resuming "autogen.sh",
the gtest won't be downloaded. And following error will occur:  

$ ./autogen.sh
+ autoreconf -f -i -Wall,no-obsolete
aclocal: error: configure.ac:1: file 'gtest/m4/acx_pthread.m4' does not exist
autoreconf: aclocal failed with exit status: 1

Move parse frame array to the Map object

* Add php support for Timestamp.

* Fix comments

This makes the frame stack per-parser, and per-thread.  Fixes #3250

* Add any support in php runtime.

* Remove unused file in config.m4

* Fix comments

* Fix error for tsrmls build

* Add newly added file to Makefile.am

Work around a bug in clang's static analyzer

Add Python 3.5, 3.6 && drop Python 2.6

Remove pre-installed softwares from prebuild steps 

Merge fixes from 3.4.x into master

Disable death tests on windows

Jenkins complains for python 2.6
DEPRECATION: Python 2.6 is no longer supported by the Python core team
ERROR: InvocationError: '/tmp/protobuf/protobuf/python/.tox/py26-cpp/bin/python setup.py -q build_py'
https://grpc-testing.appspot.com/job/protobuf_pull_request/1502/testReport/junit/(root)/python_cpp/python_cpp/

Also remove cord related code

Use message name as defined in php runtime.

Merge pull request #3535 from drivehappy/clang_warn_cleanup

Merge pull request #3494 from drivehappy/clang_warning_macro

Add Elixir protobuf and gRPC to 3rd party doc

Due to https://bugs.llvm.org/show_bug.cgi?id=34198, clang's static
analyzer emits diagnostics about leaking `container`. Doing this
assignment in two steps works around this, and shouldn't cause these
issues.

Fixing -Wexpansion-to-defined Clang warning

Fixing unused parameter warnings under Clang.

Fixing unused parameter warnings under Clang.

Remove C++11 features in io_win32.cc