simple_mxnet_converter

1. convert conf into symbol python by using symbol_converter.py
2. dump all weight into a new folder by using dump_weight.py
3. add extra script to load weight and build new mxnet symbol (sample at end file ofsymbol.py)

Note:

• It is a toy contains functions I may use, you need to add whatever you need to it
• Only support [a->b] format in conf
• Remove all inplace conf, eg layer[10->10] = softmax:sm to layer[10->11] = softmax
• every layer must have NAME