* Add Python Callstacks when Op::Run error

* Skip op with sub-block

* refactor: refine callstack info's format

* Reshape only support matrix

* Polish Python code

* Fix UT

* Fix Py3

* make fc fuse work with ditu rnn
* add ditu rnn data download to CMAKE

* link IR graph to analysis graph

* add clean code and update

* add infer_clean_pass

* add ir_pass_manager

* support fc fuse executation

* fix ir circle

Port dist_transpiler new added codes
Port ut for clone desc

* cudnn widndows

* "add comment"

* "windows support"

* "fix cmake error"

when while_grad, it writes multiple @EMPTY@ with no VarDesc.

* add rw lock test

* optimize read_write and wirte_read test

Optimize selected rows for dist lookup table with rwlock 

* Add write after write

* follow comment

Reduce one level of inheritence.

Fix pb_protobuf2 FromString problem

Fix str and bytes problem
Fix sorted problem
Fix math problem
Fix CI problem

* fix the order of sum

* add doc

* check whether need to copy

* follow comments