Release v0.3.0

Moves to OpenTracing 1.5.0, changing ABI slightly.

A build of nginx-opentracing is also provided for nginx-1.14.0, since there is currently no OpenTracing 1.5 compatible official build yet.

• Supports OpenTracing 1.5.0, will not work with OpenTracing 1.4.x
• Add support for OpenResty
• Initial priority sampling support
• Supplies language version metrics

Release v0.2.5

• Adds priority sampling
• Adds language version when publishing traces
• Adds release script (maintainer tooling)
• Fixes bazel build for external writer
• Fixes URL identifier stripping rules

Release 0.2.4

• Prepares support for upstream Envoy tracing
• Fixes issue with RNG after fork
• Conditional compilation of source dependencies needed for nginx-opentracing

Release 0.2.3

Same as 0.2.2 but moving to prefixing release binary filename with platform-arch-.

Release 0.2.2

• Removes a dependency on libcurl (is now linked statically)
• Updates documentation and examples
• Fix nginx logging errors when creating root spans

Release 0.2.1

• Adds options to override operation name and resource name

First Alpha: Nginx Tracing

First alpha release, supports basic nginx tracing using the nginx-opentracing plugin.