* Rename class type Name2XX

* Fix return type

* Remove EngineMap function in layer

* Polish function code

* Rename funciton to engine

* Fix Log msg and doc

* Rename Function to Engine and using new Function class to warp Engine

* Rename EngineInfo

* Adjust member variable order

* Move Function classes to a sub dir

* Format code

* Polish PEFuntion to speed up JitLayer

* Polish PEFunction code

* Fix comments

* Support predictor function in JitLayer

* Pybind PEFunction

* Pybind PEFunction and call phi api in layer_test

* Call sqrt phi API

* Polish flags

* Fix comments

* [JIT]Layer support eager dygraph mode and polish Function interface

* remove usless code

* fix #define

* Pybind JitLayer VarBase Function and add python UT

* Add multi program load UT

* Fix UT place error

* Update jit.save param name

* Remove some comments

* Polish cmakelists

* Polish JitLayer in Python

* Fix comments

* Polish Layer code

* Refine some api name

* Polish load program code

* Clean smoe include

* Process windows style path

* Move some funtions to utils

* Split layer_utils.cc and polish interface BaseFunction

* Polish include

* Fix cmake for funciton_schema

* Using unordered_map replace map and rename VariableNameMap

* Polish Layer Constructor and remove useless include

* Refine compilation_unit

* Fix some TODO and polish code

* Support GPU place

* Fix layer_test ci error

* Polish some code

* Make GetFunction as const function

* Remove COMMAND tar to fix CI error

* Fix comments

* Merge develop to fix codestyle error

* Load models and run PE

* Stash all code

* Fix C++ UT and refine code

* Fix string length error

* skip windows ci because windows do not have wget

* Just print out in layer_test because bce param file changed

* Refine code

* Fix pdiparam download error for layer_test

* Polish FunctionSchema and rename some arg

* New Exector only once

* Add value type for ivalue

* Read params from one pdiparam file

* Replace ivalue using Variable

* Remove ivalue file

* Fix inner_exe new

* Using DeserializeFromStream to load tensor

* Split .cc files

* Polish cmakelist