Variable declaration correction.

* Make sure to install the nnvm_compiler library.

* Add conda packge.

* Update deploy.md

Add an example in c++.

* Update deploy.md

Add an example in c++.

* Update deploy.md

Add an example in c++.

* Update deploy.md

Add an example in c++.

* Update deploy.md

Update dlpack device and type enumerations.

* update tvm

* [TOP] fix weight layout in conv2d_transpose

* Update deploy.md

Add an example in c++.

* Update deploy.md

Add an example in c++.

* Update deploy.md

Add an example in c++.

* Update deploy.md

Add an example in c++.

* [TOP] add conv2d_transpose

* update tvm

* fix pylint

* update

* fix

* use generated onnx model

* fix tests

* fix lint

* remove log filter

* add vgg

* fix tests

* update tests

* fix download

* fix ci

* fix tutorial url

* clean cache

* graph.input can be either ValueInfoProto or string

* pylint

* Change the way to import ONNX model.

* Decide ONNX version and change the processing

* Check whether onnx has the attribute '__version__'

* Correct the use of `concatenate` operator

* Optimize

* fix for composed symbol

* fix

* clean up

* fix exception type

* fix recently released layers

* fix fc layers with partial infer_shape

* add coreml

* fix bool

* fix flatten in fullyconnected

* fix duplicate flatten

* fix syntax

* add tutorial

* fix mxnet flatten, fix tutorials

* fix flatten issue

* fix lint

* resnet example merged to imagenet

* resnet example merged to imagenet

* merge with master

* merge with master

* cuda imagenet benchmakr added

* benchmark syntax fixed