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

Use real test data for fit_a_line model to get valid result

add dist word2vec unit test

Revert "Extend fill_zeros_like_op for zero-filling an LoDTensorArray …

* 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

The mkldnn batch norm supports other data format

move find_fluid_modules

remove stale coverage badge

This reverts commit bc28cf61.

We should aim for 80%. Currently, this broken 29% is scary.

* Fix tensorcopy bug

* follow comment

* Refine TensorCopy

Refactor Operator.cc, and clean code

* Fix average_accumulate_op for parallel executor.

* Fix model average on multi-GPUs.

* Fix mean iou op.

* Fix crop layer test.

* Fix unitest

* fix unitest.

fix anakin manylinux build

Add WITH_ANAKIN option log in paddle_build.sh

make framework.Parameter public

Replace lod with recursive_sequence_lengths in book examples

add timeline_cn

fix analysis compile bug