* [TOPI] Example for convolution

* update conv ex

* fix submodule HalideIR

* update conv impl

* python3

* minor fix

* fix pylint error

* Add test code

* x

* fix

* fix

* move python helper function into topi.testing

* fix pylint

* [REFACTOR] collections->container, RPC returns func, time_evaluator returns struct

* fix executor

* test of depthwise_conv2d

* fix nose test error

* python3 fix

* fix for python3

fix for python3

* Update depthwise_conv2d_map_test.py

remove sys.append

* [DOC/TOPI] Add API doc for topi

* fix lint

* first commit

* move to topi/recipe

* refactor, almost rewrite

* 2-D sum reduction; implement SAME pad; improve schedule

* add util.py; separate test script

* conv + bn + relu fusion

* auto fusion

* separate declare and schedule; using op tag

* divide large image into blocks

* move to topi; improve blocking schedule

* restructure

* add doc

* using time_evaluator

* [INTRINSIC] Add sqrt

* [INTRINSIC] Expose on cpp

* [OP] Initial start of op library

* add gtest