* Add batch_dot and cpu schedule

* Add relay support for batch_dot

* Rename batch_dot to batch_matmul

* nits

* Add missing file

* Put batch_matmul and dense x86 schedule in separate files

* Fix pylint

* Remove unused import

* Add cuda schedule for batch_matmul

* Add test case with larger batch size

* Add batch_matmul in api doc

* Fix quantize pass rounding error

* Fix pylint and minor change

* bug fix