concurrent-pump: static method queue_ack which takes vector of data_array::entry has been added
queue-pull: edited to use new static method queue_ack which takes data_array::entry vector
queue-ack: log_prefix & count must be captured by copy
logger_adapter: add newline character to the end of the message if there is no one
Merge pull request #20 from shindo/queue-ack-entry

Added usage of data_array::entry & small bug fixes