* [BUILD/CODEGEN] Allow combine multiple functions in build stage.

* Enhance code module

* fix compile

* [PERF/TIMER] Add buildin timing logic

* fix lint

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

* Fix ctypes in OSX.

* fix lint

* [PYTHON] Support DLTensor compatible API

* optimize for common path

* [PASS] Use likely tag & enable LoopPartition by default

* [PASS] Support thread_axis partition

* Take IfThenElse branch method

* [PASS] Insert branch at the innermost thread scope

* [PASS] Select candidates before trying to partition & add test for select

* [PASS] Clean code

* Fix

* Remove print & assert vectorize happens

* [MODULE/DSO] Support pack everything into one shared library.

* fix osx load

* [FIX] Miss kUInt in TypeCode2Str & dir method

* [FIX] Add regression test

* [CMAKE] Windows support upgrade

* Fix lint

* [CONTRIB/BLAS] Add CBLAS Example to contrib

* Update makefile

* [DOC] Doc redirection

* fix setup url

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

* Fix case when no device is available

* [CODEGEN/PASS] Improve callpacked lowering, allow pass array callback.

* fix cython

* [DOC] Add intro to 'comm_reducer' in tutorial; fix doc

* Fix

* Fix

* [PYTHON/FFI] Enable Cython FFI

* fix cython

* [LANG] CommReducer

* Reorganize c_api

* Remove InitValue and Combine; refactor Functor

* Make CommReducer an Expr

* Make comm_reducer type independent

* Make CommReducerNode a Node

* Small fix

* Refine

* Refine front api; add integration testcases for min/max

* Fix python

* Refine

* Fix lint and add example

* [PASS] StorageRewrite, reuse memory pass as in NNVM.

* fix issue

* [LANG/CODEGEN] Intrinsics and Extern Math

* fix lint

* [DOC] Scan tutorial

* Fix according to ziheng's comment

* [DOC] Add schedule_computaion

* Finetune the doc

* Finetune the doc

* Finetune the doc

* Set max_unroll_step=0 by default