-- code added

Merge remote-tracking branch 'origin/master'

-- code added

-- defining result code by flatbuffer(on developing.. hard to use flatbuffer for result object)

-- separate common package

-- common service structure added

-- statistics service fix

-- statistics service fix

-- packet dispatching

-- flatbuffers version up

-- packet dispatch logic added(prototype)

-- send test code added

-- byte array decoder/encoder added

-- flatbuffer packet send/recv test(packet manager)

-- flatbuffer packet send/recv test