* fix the licence, test=doc

* Update ctc_beam_search_decoder.cpp

* Update ctc_beam_search_decoder.h

* Update ctc_greedy_decoder.cpp

* Update ctc_greedy_decoder.h

* Update decoder_utils.cpp

* Update decoder_utils.h

* Update path_trie.cpp

* Update path_trie.h

* Update scorer.h

* Update scorer.cpp