* improved conv2d for last group of workloads

* conv2d_nchw improved on 14_256_256 and 56_64_128

* [SCHEDULE] Enahance cache_write to enable layout change.

* more tests

Fix markdown syntax error (code shifts out of markdown-code box).

* relu activation migrated to topi

* reviews addressed

* relu compute deleted

* conv2d_nchw updated

* resnet18 hand tuned schedule added

* pylint error fixed

* one more workload test for conv2d_nchw

* conv2d schedule subfunctions added for different patterns

* reviews addressed

* [TEST] Add memoize to save test data

* Update comment

* mark py version

* [SETUP] Always use relpath for setup

* [CMAKE] Fix cmake llvm build

* CPU Schedule for raspberry pi

* Update

* Update

* Add topi.target

* Refactor

* Update

* Make python3 happy

* Improve

* Improve

* Improve

* Use get_const_int

* [SCHEDULE][PASS] support storage_align of certain axis

* fix lint

* [DOCS][APP] Add Example for C++ deployment

* fix lint

* [TOPI] improve elemwise schedule

* modify fuse

* [CODEGEN] NVPTX backend.

* Fix pylint

* use fix

* convolution compute typo fixed

* relu activation migrated to topi

* reviews addressed

* elemwise schedule added

* relu compute deleted

* [TEST] Jenkinsfile

* Fix wheel setup

* v2: runtime support for rocm

* fixed coding space errors

* removed kROCM from c_runtime_api.h

* [SUBMODULE] update dmlc-core

* [TEST] Not keep ROCM link but only verifies it

* [APP] Android RPC first version

* [APP] Android RPC build jni automatically

* [APP] Android OpenCL RPC tested on real devices

* [APP] optimize android app interface. add ndk compile tool

* add ndk compile tool

* [APP] fix android app thread crash; add android test script

* [APP] android app - show alert dialog and disconnect when error occurs

* fix ndk build script code lint

* fix ndk build default argument

* ndk script build remove shell=True. disable android app screen orientation