* Add edges to graph. Add squeezenet to mock data.

* rm json

* rm pb files and add links to them

* Add edges to graph. Add squeezenet to mock data.

rm json

rm pb files and add links to them

* added download script

* typo

support onnx as graph data format and add related API

Merge branch 'feature/apply_frontend_travis_ci' of github.com:ChunweiYan/VisualDL-1 into feature/apply_frontend_travis_ci

* scalars frontend basically done

* frontend rename common/fun to util

* add images, scalar config

* add expandpael arrow

* fix scalars tooltip display problem

Update data format design

add graph data format design

* modified something in frontend directory

* modified gitignore

* remove node_modules