* change 'math' to 'math_kernel'

* fix compile bugs

* merge develop

* fix compile bugs

* refactor matmul directory in pten

* fix merge conflict

* move reshape

* fix compile bugs

* delete manipulation file

* fix compile bugs

* rename to api to copy_to

* revert needless change

* polish format

* add register general kernel marco

* move copy kernel impl

* revert needless change

* polish details

* fix xpu compil faild

* fix xpu compile failed

* polish format

* add pten kernel cmake

* add pten kernel cmake function

* fix compile error

* add enforce include for full kernel

* fix compile failed

* change cuda to gpu

* fix cmake function error

* rename cuda to gpu

* revert CMake change

* resolve conflit

* rename other cuda to gpu

* poish details