Test redundant varint fields decoding in JS.

Remove the instructions for pbconfig.h

Fine-tune build scripts and better documentation.

Add compatibility notice for Java.

Varints are generally encoded in minimum possible length but need to
ensure that any redundancy does not break fields decoder.

Move test for standalone BoolValue to JsonParserTest

"make google/protobuf/stubs/pbconfig.h" was added in hope of addressing
the issue that when you "make protoc" from a freshly checked out
project, pbconfig.h will be reported missing. However, the trick doesn't
seem to work. Instead, add instructions in the document to work the issue
around.

Also document why MSYS2 cannot be used for publishing protoc.

Fix C++ Boost incompatibility on Windows/MSVC

Also added a standalone formatter test, for confidence.
Have validated that undoing the change in 835fb947 breaks the tests
(i.e. we are still testing that the change is required).

Fix C# Json parsing of well-known type Boolvalue

Declare an init and avoid passing NULL to initWithValue:count:

Fixes https://github.com/google/protobuf/issues/1189

Build cleanup

Remove accidentally restored deleted files.

Fix the std::string error introduced in integration.

updated README

Updated README.md

- Fixes up `make distclean` and `make maintainer-clean`
- Fixes the build so make is more likely to notice if one of those files is stale/missing.

Added relative link to cmake guide.

Allow custom type URL prefixes in Any.Pack

Fix bug with silent message corruption in LITE_RUNTIME.

Properly generating well known proto files for the macos build.

Added framework for generating/consuming benchmarking data sets.

Few tweaks to the rakefile to permit native gems compilation with the proto files generation.

Merge Google internal changes