Update Tests/Command/ConsumerCommandTest.php

add memory-limit option to testInputsDefinitionCommand

Update RabbitMq/Consumer.php

Update RabbitMq/Producer.php

Allow developer to establish delivery_mode and content_type

Update RabbitMq/Consumer.php

Change method with checks is process is memory overloaded

Update Command/BaseConsumerCommand.php

Update README.md

Update README.md

Update Command/BaseConsumerCommand.php

Set NULL as default option for memory-limit  and only call ini_set if memory-limit is not null

Update RabbitMq/Consumer.php

Checks memory-limit is not null before checking whether memory in use is greather then memory limit

Update RabbitMq/Producer.php

Update RabbitMq/Producer.php

Update RabbitMq/Producer.php

Update RabbitMq/Consumer.php

Curly brackets of isRamAlmostOverloaded and memoryToBytes on the next line

Update README.md

Change -a flag. Now is -l

Update README.md

Documentation of setContentType and setDeliveryMode belongs to the other branch.