* Add the dynamic load of nvrtc, and support runtime compiling of CUDA kernel using nvrtc.
test=develop

* Call CUDA driver api to launch the kernel compiled by nvrtc.
test=develop

* Disable for mac and windows.
test=develop

* Refine the codes to support manually specified num_threads and workload_per_thread.
test=develop

* Refine the CUDA kernel to support large dims.
test=develop

* Add DeviceCodePool to manage all device codes.

* Add the first implementation fusion_group op.

* Add unit-test for fusion_group op.

* Add the check of result.

* Add the check of nvrtc in unit-test.
test=develop

* Add comment to explain the inputs, outputs and features of fusion_group op.
test=develop

* Disable fusion_group op for mac and windows.
test=develop

* Make the compiling of device code return status instead of hanging up.
test=develop

* Add the check of whether there is CUDA driver library, and do not core dump when failing to call the CUDA driver API.

* Unify fusion_group_op's input and output names.
test=develop

* Add the check of CUDA driver library in unittest.
test=develop

* Refine the calling of PADDLE_ENFORCE.
test=develop

* Fix example in log_loss doc, test=develop

* Use none for unknown dim, test=develop, test=document_fix

* test=develop fix generate_proposal_labesl op

* convert dtype of vars for range op, test=develop

* update error information about batch_norm_grad

* update bn,test=develop

fix unittest for spp op

* fix integer overflow in match_matrix test=develop

* fix integer overflow in match_matrix test=develop

* fix typo test=develop

* move private weight properties to public ones
test=develop

* revert changes to FC
test=develop

* fix unittest
test=develop

* fix unittest
test=develop

* fix coverage
test=develop

* fix merged dev
test=develop

* bug fix
test=develop

* update doc, test=develop

* fix related unittests, test=develop

* fix str incompatible error, test=develop

* add is_empty_grad_op for OpTest, test=develop

 fix the doc of scatter

* expost fluid.dygraph.TracedLayer apis, test=develop

* polish doc, test=develop

* follow comments, test=develop, test=document_fix

* follow comments, test=develop

* remove save_inference_model return value, test=develop

* enhance checking validity of apply_gradient test=develop

* refactor code test=develop

* stash

* add adamOptimizer test=develop

* add adamOptimizer test=develop

* update layers used in mnist dygraph model, test=develop

* fix import issue, test=develop

* add dygraph utils, test=develop

* add unittest, test=develop

* test=develop add fp64 check_grad for conv2d, conv3d

* fix no grad check for pool_max & spectral_norm. test=develop

* use large input size in test_add_position_encoding_op.py, test=develop

* revert shape_white_list, test=develop

* add xly py35 dockerfile

* test=py35

* test=py35

* test=py35

* test=py35

* test=py35

* test=py35

* test=py35

* test=py35

* test=py35

* test=py35

* test=py35

* test dockerfile

* test=py35

* test=py35

* test=py35

* test=py35

* test=py35

* test=py35

* test=py35

* test=py35

* test=py35

* test=py35

* test=py35

* test=py35

* test=py35

* test=py35

* test=py35,test=develop,test=inference,test=document_fix

* fix seqconv_eltadd_relu pass during multi-threads predictor, test=develop

* fix attention_lstm_fuse_pass during multi-threads inference, test=develop

* fix embedding_fc_lstm_fuse_pass during multi-threads inference, test=develop

* fix fc_lstm_fuse_pass during multi-threads inference, test=develop

* fix seq_concat_fc_fuse_pass during multi-threads inference, test=develop

* Refine multihead kernel, align block to 32

test=develop
Signed-off-by: Nzhaoyuchen <zhaoyuchen01@baidu.com>

* Refine log comments

test=develop
Signed-off-by: Nzhaoyuchen <zhaoyuchen01@baidu.com>