Support tensorflow 1.0r1
Support tensorflow 1.0r1

apply change on rnn.
- tf.nn.rnn_cell.* => tf.contrib.rnn.*
- tf.seq2seq.basic_rnn_seq2seq.* => tf.contrib.legacy_seq2seq.*

bluedisk/DeepQA,bluedisk/DeepQA,bluedisk/DeepQA,bluedisk/DeepQA