* add grep enforce shell, test=develop, test=document_fix

* add copyright desc, test=develop, test=document_fix

* refactor four scripts, test=develop, test=document_fix

* change white list var, test=develop, test=document_fix

* add args for count_enforce_by_file, test=develop, test=document_fix

* polish reader error message, test=develop

* fix detail error, test=develop

* reset activation dcudnn change, test=develop

* Optimize the error messages of paddle CUDA API, test=develop

* fix the error messages of paddle CUDA API, test=develop

* Refactoring PADDLE_ENFORCE_CUDA_SUCCESS, and apply to curand/cudnn/cublas/NCCL,test=develop

* remove build_ex_string,test=develop

* merge conflict,test=develop

* enrich count enforce scripts, test=develop, test=document_fix

* add usage & result, test=develop, test=document_fix