* [DOC] Add Build TVM Runtime on Device section

Add Build TVM Runtime on Device section

* Add echo USE_RPC=1>> config.mk in code-block

Add echo USE_RPC=1>> config.mk in Build TVM Runtime on Device section

* [DOC] Fix small problem

Add some notes about LLVM before building TVM

* softmax migrated and test added

* pylint error fixed

* pylint error fixed

* modify depthconv padding

* fix shared memory overflow in depthconv schedule

* update installation guide of windows

* update installation doc of windows

Add install prerequisites of customized building

* [BUILD][LLVM] Support LLVM mainline 5.0 6.0

* Reduce parallelism

* conv_nchw parameter updated to the one which generates mobilenet benchmarks, doc typo fixed

* removed unused variables

* [NNPack] Support for threadpool

* fix lint

* fix lint

* Use static class function

* rename the nchw and pass the unit test; going to do it for nhwc depthwise

* bug with fusion

* nchw works fine; nhwc float32 problem remains

* still cannot bind them together

* fusion works

* syntax fix

* all bugs fixed; test cases pass

* minor fix on nn.h

* [Contrib] CuDNN v7 Support

* Add test

* __init__ updated

* pull request updated

* build_module added

* typo fixed

* another typo fixed

* conv2d gpu scheduler for two layouts moved to tvm

* changes made according to CR

* conv2d_nchw formating updated, conv2d_hwcn tests updated

* lint error fixed

* element wise operator schedule fusing fixed for conv2d

* conv2d_nchw topi test added, all resnet workloads now pass

* conv compute lint error fixed

* fixed python 3 compatibility problem

* conv2d tensor input support added, test typo fixed, ir_pass.Simplify changed to util.get_const_int

* fixed channel numer < 4 error, also made sure other splitting factor woudn't be 0

* [TOPI] Add ops compute

Remove 'compute' and add assert for safety

Add document

fix lint

fix softmax

* fix batch norm

* [TOPI] Move ewise.h -> elemwise.h

* fix test

[TOPI] Add broadcast and reduce operators