Update README.md
Update README.md
Environment setting POSTAGE_DEBUG_MODE=true now drives debug output

Queue declaration code has been unified under queue_bind()
Merge branch 'debug_mode' into version3.0.1
Version information added
Merge branch 'version3.0.1'
Fixed wrong use of self.eks in _rpc_send()
Merge branch 'fix_rpc'
Version 3.0.2
Removed multiple declaration of MessageHandlerType class
Merge branch 'fix_multiple_classes'
Version 3.0.3
Initial package structure
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