* [Python API] Add MemoryState API
* use inferRequest instead of IInferRequest
* implement VariableState through cpp
* small fixes + add tests for preprocess_info
* update license
* remove the first blank lines and undo changes in inference-engine/thirdparty/mkl-dnn
* test commit
* Update license in tools
* Undo changes in api_overview.md
* update ie_api.pyx and set interpreter in hello_query_device