Merge pull request php-amqplib#501 from thiagotalma/patch-1

Ensure STDOUT and others constants

Merge pull request php-amqplib#486 from nubeiro/2.7.0-rc1-release

Update changelog for v2.7.0-rc1

Merge branch 'master' of github.com:php-amqplib/php-amqplib

Update changelog

Update phpunit configuration and code coverage

adds tag v2.6.0

adds tag v2.5.2

adds v2.5.1 tag

adds version 2.5.0

adds version 2.4.1