Update README.md

Add LL to large constant

needed a grave here, not an apostrophy

Some compiler will report: 'error: integer constant is too large for long type'

In php, class name cannot be "Empty". Modified code generator to (#2375) generate GPBEmpty instead (for google.protobuf.Empty only). Also change
runtime code to work with the new generated code accordingly.

Class is final but declares protected field

typo in readme

Add missing include in message_lite.cc

More Ruby-eqsue interface

JS: Fix for high utf-8 codepoints.

Fix #include in js_generator.cc

Fix csharp/src/Google.Protobuf.Test/project.json

This change fixes the following Chromium presubmit error:

  third_party/protobuf/csharp/src/Google.Protobuf.Test/project.json could
  not be parsed: Expecting property name: line 25 column 3 (char 482)

This changes fixes "use of undeclared identifier 'INT_MAX'"
compilation error.

Reland commit f2885f61 that has been trampled by commit d64a2d99.

Fixed JavaScript license declaration.

This class is declared to be final, but declares fields to be protected. Since the class is final, it can not be derived from, and the use of protected is confusing.

Resolve old TODO for StringTypeHandler.

StringSpaceUsedExcludingSelf has been part of the lite library since
b913cbd3.

MessageOptions should handle both proto2 and google.protobuf package names.

#2356 : fix ExceptionInInitializerError on IBM J9

Fixes deprecation warnings/errors on Xcode

This is done so that the same library can be used irrespective of whether MessageOptions belong to package name 'proto2' or 'google.protobuf'

Added explicit cast to avoid size warning on Win64.

Use latest maven-compiler-plugin (2.6.0)