* Fixed framework name attribute for onnx, mxnet.
* Fixed framework name attribute for caffe.
* Removed unnecessary attribute setting from add_opoutput()
* Added identity nodes adding to outputs in mxnet loader.
* Removed unnecessary reformat.
* Removed unnecessary reformat.
* Added check for empty name.
* Used nodes indices instead of node names in loader.
* Code refactoring, small bug fixed.