Timestamp and ByteArray JSON serialization

Timestamps get serialized as ISO 8601 strings, and byte arrays as base64 strings.

Experimental JSON Support

This release includes experimental support for JSON serialization and deserialization. It is currently hard-coded to only support snake_case for well-known-types, and is currently not passing all the JSON conformance tests.

Named enums and package mapping

Features:

• [#5] - Enums are now implemented as sealed classes, and specify a fromName(string: name) function for retrieving by name
• [#6] - Adding a kotlin_package_mapping option, that can map proto packages to different kotlin packages

v0.5.1:

• Annotate protoSize with @Transient for serialization interop

v0.5.0

• Extend the Message.plus() function to work with a null object on the left side
• Add Message.defaultInstance and Message?.orDefault()
• [BREAKING CHANGE] Move oneof value to the parent sealed class. The value of a particular oneof field is now accessed via the name value rather than the name of the field.
• Add properties on the parent message for all fields inside of a oneof

v0.4.1

• Fallback to java_package when kotlin_package isn't specified
• Fix overzealous underscores being appended to oneof type names

v0.4.0

• Add generateProto as compile dependency (fixes cretz/pb-and-k#4)
• Build an artifact compatible with the protobuf gradle plugin (fixes cretz/pb-and-k#18)
• Fix path parsing for the kotlin_service_gen option
• Check gradle wrapper 4.7 into git
• Reference Streem's fork instead of upstream in package names