* add l1 l2 regularization

* fix some problem

* Fix bug

* fix op API

* Fix a bug in op

* add l1l2

* remove regularization_diff_blob

* remove sign in kernel_util

* fix naming problem and add l1l2 function

* simplify code

* remove else

* update modelupdate API

* Fix bug

* ~

* fix bug

* add basic_rnn_op

* Fix naming problem

* clang-format

* Fix bug for hidden_diff_blob update

* Fix bug for hidden_diff compute

* fix bug for h0 initilizer

* fix bug for h0 initilizer

* add else

* remove else

* fix

* optimize

* optimize

* add has_init_hidden_initilizer

* optimize


Former-commit-id: c7bf405e