Use new onnxoptimizer, enable more optimization pass

Revert "use onnxoptimizer instead of onnx.optimizer"

This reverts commit c54d4ec.

use onnxoptimizer instead of onnx.optimizer

Fix daquexian#89

disable fuse_add_bias_into_conv for now

update dynamic shape nodes

Support dynamic shape nodes

add --skip-shape-inference cli arg to avoid segfault on some large mo…

…dels

change the default value of skip_fuse_bn from False to True

keep the increased input list