Adds support for report metrics

Failures on reporting used to polute logs as they were throwing exceptions, now exceptions are not being propagated but instead they are reported with metrics.

Guards for not to crash on malformed propagated context

This version avoids failures when extracting a malformed context: https://github.com/jcchavezs/zipkin-php/pull/65

Adds http.route tag

Zipkin 2.5 formalizes the http.route tag for a better span naming.

v1.0.2

• Adds documentation to tags (a393eec)
• Removes try/catch in the reporter (4e92bcf)
• Fixes PercentageSampler namespace (6ebebb6)

v1.0.1

In 1.0.0 we have been discarding traceId and spanId with no 32 and 16 respectively length. Since brave does support shorter traceIds and spanIds as long as they are not empty we need parity on that to be tolerant readers.

v1.0.0

Merge pull request #50 from jcchavezs/adds_usability_tweaks

Adds some usability tweaks.

Some usability improvements

Merge pull request #50 from jcchavezs/adds_usability_tweaks

Adds some usability tweaks.

Final tweaks on the TraceContext and SamplingFlags

Merge pull request #49 from jcchavezs/fixes_readme

Fixes in README

Removes Guzzle dependency

This release include some renaming of classes and the removal of the guzzle dependency.

1.0.0-beta4

• Adds support for in process context propagation (https://github.com/jcchavezs/zipkin-php/issues/29).
• Minor fixes in the namespace of tests.