* support fallback & fix bugs in tuners & clean topi test

* update task extraction

* update task extraction

* fix arm tutorial

* Update tune_nnvm_arm.py

* Improve x86 pooling and concat

* Fix

* Fix test concatenate correct layout

* Add conditional vectorize

* Fix lint

* Modify schedule for global pooling

* Fix

* Fix warning

* Fix alter layout test

* Remove vectorization for pooling when using 4D layout

* Remove vectorization for 4D concat

* Fix concatenate layout

* Fix concatenate schedule

* Fix concat

* Fix lint

* Fix concat

* Simplify pooling logic

* Update docstring

* Fix test topi pooling

* Small changes

* [TOPI] add injective scheduler for HLS backends

* Introduced PrintBinaryExpr

* adapt avx schedule for sse

* fixed output type when mixed precision mode

Updated documentation error