* [TUTORIAL] Add tutorial for RPC

* [TUTORIAL] Update tutorial

* [TUTORIAL] Update tutorial

* trigger update

* [TUTORIAL] Improve build

* Improve makefile

* Fix

* [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

* [PYTHON/FFI] Enable Cython FFI

* fix cython

* [RUNTIME] Refactor runtime to be DLPack compatible. Enable plugin of new runtime.

* fix mac compile

* ok

* [VERILOG] Basic Verilog Testflow

* fix build

* fix the comment

* fix lint in verilog

* [OP/LANG] Support Extern Call, more regression tests

* [TEST] Include pylintrc

* [LLVM] Initial support for codegen LLVM.

* Fix the naming issue of codegen

* [CODEGEN] CUDA/OPENCL pipeline complete

* Hide TVMType by str in frontend

* [RUNTIME] Finish GPU runtime and python interface

* fix travis test

* fix build

* [RUNTIME] Add interface header of runtime

* fix mac build

* [LANG] Include buffer semnatics, introduce pylint

* Refactor inline add support for buffer indexing

* fix doc