* [STORAGE][BUFFER] Support access ptr for clear access pattern.

* fix lint

* [SCHEDULE] Detect useless bound early

* fix

* prefetch interface added

* prefetch python comments modified. prefetch info data structure maintained.

* start injecting prefetches. first step (domain touch) implemented.

* domain touch tested.

* Prefetch ir_mutator and ir_visitor dispatch registered.

* modify domain touched from passing a func_ref to passing a tensor

* modify domain touched from passing a func_ref to passing a tensor

* modify Tensor copy to Tensor ref

* temp commit for rebase

* debug info removed, typo fixed, ready to rebase

* prefetch flatten test add!

* roll back builtin functions to side effect functions

* lint error fixed!

* add cache line size to storage flatten argument

* forgot modifications add

* change code style to dmlc-like; get rid of can_prove, use manually compute instead

* python lint error fixed

* modify instrinsic name to pass tests

* [TEST] get rid of str(), replace them by accessing attributes

* change map to list comprehension

* redundant numpy import removed

* [RPC] Allow backpressure from writer

* fix

* fix

* [EXECUTOR] Enable load executor remotely

* [EXECUTOR] Pipeline

* Pass bytearray directly

* Enable load dynamic library in rpc_server.py

* Fix

* lint

* Return Module from remote side directly

* Remove unused header file

* Fix

* fix

* [INTRIN] prefetch support

* lint

* add buildin

* [REFACTOR] collections->container, RPC returns func, time_evaluator returns struct

* fix executor

* [RUNTIME][RPC] Change RPCServer to Event Driven Code

* fix

* [RUNTIME] Add workspace pool

* fix doc

* fix the free list

* avoid zero size

* [RUNTIME] Add System Lib

* lint

* lint

* fix compile

* [C API] Make DSL API registerable, add copy from/to raw bytes

* fix cython

* [CODEGEN/PASS] add restricted, alignment option

* fix lint

* Fix the alloca

* [IR] Add body to AssertStmt

* fix lint

* [TAG] Add op_tag module for tagging operator

* Fix accroading to comments

* Add example

* Add into doc

* Add --fix-missing for docker

* [REFACTOR/PASS] Formalize argument bind and match util

* grammar

* Add NNPack Fully Connected Inference

* Add NNPack fully_connected_output

* Fix lint

* Fix

* [INTRINSIC] Add sqrt

* [INTRINSIC] Expose on cpp

* [OP] Initial start of op library

* add gtest

* [LANG] Expose tvm.cast

* Update

* Add unittest