* Add test for graph edges

* add new line

* add google protobuf

* add onnx to travis

* install protoc and move installs to tests.sh

* tune protoc

* try to install onnx

* onnx always fails on travis, try script from onnx github

* install protobuf 3.1.0 but not onnx

* in the right dir

* tune path

* should work

* put onnx_pb2 there and it should work

* what if remove onnx_pb2.py

* cp compiled onnx_pb2 to the right place

* debug

* protoc

* install protoc

* chown

* test

* added protc, should work

* typo

* does it exist?

* hmmmm

* try dropbox

* test 1

* now it should work

* done

* make tests more thorough