concurrent-pump: added test for concurrent_pump
concurrent-pump: concurrent_pump class changed to ensure thread-safe execution
ya_concurrent_reader: added ya_concurrent_queue_reader class
concurrent-pump: changed method naming (request_complete -> complete_request)
ya-queue-pull: added app analogous to queue-pull but using ya_concurrent_queue_reader
Merge pull request #5 from shindo/shindo-ya-concurrent-reader

ya_concurrent_queue_reader