This change should not impact most of the users as starting from `0.10.0` it is not required (and not recommended) to
manually set the transport. `DDtrace\Transport\Http` no longer accepts a logger as the second argument as it uses
the globally registered logger. If you are using the `Http` class, just remove the second argument from the constructor
invocation.
### Added
- Support for guzzle 6 #254
- Configurable Sampler #260
- Debug mode for logging #261
- Support for symfony 3.3 #266 and #243
- Build php 5.4 extension locally #267
- Basic tracing for unsupported and custom frameworks #264
### Fixed
- Composer PHP compatibility declaration #247
- Release notes for PECL and fix type-os in CHANGELOG #248
- Add missing files to PECL releases #252
- PHP 5.4 installation and build #255
- Trigger of autoloader un-tracing did not respect object #256
- docker-compose based packages verification #257
- Incorrect tar command in one-liner example from getting_started.md #258 - thanks @danielkay
- Auto-instrumentation in Symfony 3.4 and PHP 5.6 #262
- Type-o in command to install .deb packages #263