“caa90a65107ee48c14da2c9b52a19d1b727a0738”上不存在“...paddle/fluid/tests/unittests/test_communicator_async3.py”
* Fix bug in MergeModel.cpp. * Add a c-api inferface to initilize the thread environment of Paddle and add a GPU example. * Add some note for paddle_init_thread and move the inplementation of paddle_error_string into a .cpp file. * Add some comments.
