* [RUNTIME] RPC runtime that support run testing on remote device.

* Fix ctypes in OSX.

* fix lint

* [CONTRIB/BLAS] Add CBLAS Example to contrib

* Update makefile

* [CODEGEN/RUNTIME] Metal support, runtime improvement.

* Fix case when no device is available

* [LLVM] Initial support for codegen LLVM.

* Fix the naming issue of codegen

* [RUNTIME] Finish GPU runtime and python interface

* fix travis test

* fix build