Merge branch 'master' of https://github.com/ICANS/RabbitMqBundle
Merges ICANS/RabbitMqBundle master into paulkamer/master

Resolves merge conflicts:
	DependencyInjection/OldSoundRabbitMqExtension.php
	README.md
	RabbitMq/BaseAmqp.php
	RabbitMq/Producer.php
corrects README.md to explain support for old string representation for arguments
removes unnecessary whitespace char

See: https://github.com/videlalvaro/RabbitMqBundle/pull/151#discussion_r8725770
reverts changes made to the readme, they caused only confusion
Updates changelog and readme for PR #151
Adds getter for basic properties, to ensure properties set with setters are used
Merge pull request #151 from paulkamer/master

Added optional AMQP-Messages Properties to publish method of the Producer (resolves merge conflicts of #55)