Add RWMutex for parameter server.(with bugs)
Wait last push ack before training ends.
Add end train condition in SAE train.
Alter SAETrain mutex bug.
Fix segment fault by modify batch-size.
Fix epoch controling bug.
Train without recv ack checked right.
Fix SAETrain dead lock (with segement fault)
Delete useless sentences.
Parameter push and pull complete.
Delete useless sentences.