* Shrink reshape_op library size
* User can register a standard C++ functor as a op kernel

* Add anchor generator operator for Faster-RCNN.
* Add unittest testing.
* Add Python API.

This is part of big move of v2 codes to legacy sub dir.

* memory init

* add env

* refine anounce

* Add check for Nan

* Debug

* Add env for cc_test

* Add env for py_test and nv_test

* Remove py_test env

* Add env for py_test

* serial test_recognize_digits

* Test FLAGS_init_allocated_mem function for unit test

* Init allocated mem for op unit test

* Add env for all unit test

This reverts commit bc28cf61.

* Fix tensorcopy bug

* follow comment

* Refine TensorCopy