* Add flag to set prior_box output order.

* Add a fake_quantize_op, which quantize an input tensor to a tensor with lower bits.

* Design doc of fixed-point quantization.
* Update fixed point quantization desigin doc.
* Fix doc format.
* Update the backward part.
* Fix the grammatical.

* Add region proposal network (RPN) target assign operator and Python API for Faster-RCNN.

add check for patchelf in CMakelists.txt

added cycling the dataset for cifar and flowers

Fix grpc destroy bug

fix mac build and whl pkg

[WIP] Dev reader reset all

* Fix batch norm when only 1 elements in normzalize dimension during training.

Update hyperlinks in workflow_of_capi_cn.md

fix compile warning in inference related codes

pull from base

1. Fix bug when only true or false branch works.
2. Fix bug in unit testing.

Update version via git tag

Merge branch 'dev_reader_shutdown_start' of https://github.com/JiayiFeng/Paddle into dev_reader_shutdown_start

version it is staying on