Fix compling with cuDNN v5

fix(Compile): fix depends error when compile op using cub

fix mac compile of analysis

test=develop

Add API example for logical ops and clip ops

fix(Macos): fix compile on macos

Change requirements to support python 3.7

fix avg pool trt bug 

test=develop

some operators depend on cub and xxhash by header. The dependency should be declared explicitly rather than declared to pybind.

test=develop

test=develop

test=develop

test=develop

add warm up in TestMultiThreadPrediction

test=develop

fix(Mac): fix unittest of macos

[MKLDNN][JIT][AVX512] Elementwise Mul

Fix gpu load model and demo_ci on trt

test=develop

test=develop

test=develop

add allocator.h copy

disable two openblas test temporary

Implement leaky relu converter from fluid to tensorRT

test=develop

Add python example for resize_nearest Api

Optimize the stack operator

test=develop

test=develop

* Initialize the elementwise plugin.

* Implement the basic CUDA kernel of elementwise plugin.
test=develop

jitcode act support all size

Introducing MKL to softmax for inference

* refine GraphCheck
test=develop

* fix ci fail
test=develop