* Case-sensitive CMake module for OpenCL

Case-sensitive CMake module for OpenCL, see https://github.com/Kitware/CMake/blob/master/Modules/FindOpenCL.cmake .

* fix in case Metal locates OpenCL as well

fix in case Metal locates OpenCL as well

* [ARITH] Improve detect linear equation

* fix doc

* add argmax argmin

* remove coder saver

* conv2d tweaked for better end-to-end performance

* syntax changed

* conv2d layout change bug fixed

* remove debug msg

* misaligned error fixed

* [TOPI] Add left_shift, right_shift, clip, cast

* [TOPI] Add test

* [TOPI] Fix

* [LANG] Support for Bitwise Operation

* Add test

* [DOCS] How to deploy TVM Modules

* More comments

* [TOP] Initial Schedule of MobileNet on Rasp

* Fix

* Fix

* Move target to tvm; rename convolution as conv2d

* Fix

* Fix

* add squeeze

* should be squeeze

* [TOPI]add reshape

* fix problems

* fix lint

* try to add concatenate

* fix lint and error

* fix doc

* fix error

* try to add split

* fix lint

* fix error

* fix lint

* [RUNTIME] Minimum graph runtime

* update docs

* conv2d layout change and packing added for the last workload

* packing added for other workloads

* conv2d added packing for first workload

* fix pylint error