Add changelog for v3.0.0-beta-2.
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Change-Id: Id383944dd3c999ad1008345ef34c9bdae24abc7c
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+2015-08-26 version 3.0.0-beta-1 (C++/Java/Python/Ruby/Nano/Objective-C/C#/JavaSript)
+ General
+ * Intorduced a new language implementaion: JavaScript.
+ * Added a new field option "json_name". By default proto field names are
+ converted to "lowerCamelCase" in proto3 JSON format. This option can be
+ used to override this behavior and specify a different JSON name for the
+ field.
+ * Added conformance tests to ensure implementations are following proto3 JSON
+ specification.
+
+ C++ (Beta)
+ * Various bug fixes and improvements to the JSON support utility:
+ - Duplicate map keys in JSON are now rejected (i.e., translation will
+ fail).
+ - Fixed wire-format for google.protobuf.Value/ListValue.
+ - Fixed precision loss when converting google.protobuf.Timestamp.
+ - Fixed a bug when parsing invalid UTF-8 code points.
+ - Fixed a memory leak.
+ - Reduced call stack usage.
+
+ Java (Beta)
+ * Cleaned up some unused methods on CodedOutputStream.
+ * Presized lists for packed fields during parsing in the lite runtime to
+ reduce allocations and improve performance.
+ * Improved the performance of unknown fields in the lite runtime.
+ * Introduced UnsafeByteStrings to support zero-copy ByteString creation.
+ * Various bug fixes and improvements to the JSON support utility:
+ - Fixed a thread-safety bug.
+ - Added a new option “preservingProtoFieldNames” to JsonFormat.
+ - Added a new option “includingDefaultValueFields” to JsonFormat.
+ - Updated the JSON utility to comply with proto3 JSON specification.
+
+ Python (Beta)
+ * Added proto3 JSON format utility. It includes support for all field types
+ and a few well-known types except for Any and Struct.
+ * Added runtime support for Any, Timestamp, Duration and FieldMask.
+ * [ ] is now accepted for repeated scalar fields in text format parser.
+
+ Objective-C (Beta)
+ * Various bug-fixes and code tweaks to pass more strict compiler warnings.
+ * Now has conformance test coverage and is passing all tests.
+
+ C# (Beta)
+ * Various bug-fixes.
+ * Code generation: Files generated in directories based on namespace.
+ * Code generation: Include comments from .proto files in XML doc
+ comments (naively)
+ * Code generation: Change organization/naming of "reflection class" (access
+ to file descriptor)
+ * Code generation and library: Add Parser property to MessageDescriptor,
+ and introduce a non-generic parser type.
+ * Library: Added TypeRegistry to support JSON parsing/formatting of Any.
+ * Library: Added Any.Pack/Unpack support.
+ * Library: Implemented JSON parsing.
+
+ Javascript (Alpha)
+ * Added proto3 support for JavaScript. The runtime is written in pure
+ JavaScript and works in browsers and in Node.js. To generate JavaScript
+ code for your proto, invoke protoc with "--js_out". See js/README.md
+ for more build instructions.
+
2015-08-26 version 3.0.0-beta-1 (C++/Java/Python/Ruby/Nano/Objective-C/C#)
About Beta
* This is the first beta release of protobuf v3.0.0. Not all languages
