“6803b882542d93a22a5f6991efb7d17019903bfc”上不存在“develop/doc/faq/model/index_en.html”
* 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.