* Modify data download function, and support unittests of inference APIs on windows, test=develop

* The import error compatible with py2 and py3, and fix unittests problems of inference APIs on Windows, test=develop

* add local data preprocess support for imagenet
test=develop

* add local data2bin tests
test=develop

* locally two tests passed
test=develop

* change according to reviews
test=develop

test=develop

* fix preprocess script with processbar, integrity check and logs
test=develop

* delete unnecessary empty lines, change function name
test=develop

test=develop

test=develop

test=develop

test=develop