* Eagerly drop local scope in iteration

* Correct create var

* Fix typo

* Debug

* Add USE_OP of all operators and kernels and remove ARCHIVE_START/END in CMakeLists.txt of inference unittests.

* Remove ARCHIVE_START/END when linking inference shared library.

* Disable some fluid related cmake operations for cross-compiling.

* remove net op and cond_op

* fix cpplint

* fix dependency

* delete backward_test; fix compile

* disable batch_norm backward

* rm test_net.py

* make batchnorm test independent of backward.cc

* make test_layer_norm_op independent of backward.cc

* make test_layer_norm_op independent of backward.cc

* delete unused code

* clean up

* Fix cpplint errors, round2

* Fix pointer issue

* fix gemm error for cuda 7.5

* fix version number

* add cuda_device_functions.h

* move reduceSum to elementwise_op_function.h

* Remove call_once.h

* "fix ci"