Expose Inference in Python V2 API.

Adjust float precision in img_conv2 for unit test

change to lapacke

modify img_conv2 unit test

remove cmake python output

Remove the feenableexcept in initPaddle.

force delete packages before unit test

fix gpu_img_conv2 float precision issue

using one thread to dump sequential output

'numpy.ndarray' object has no attribute 'tobytes'

run python tests in virtualenv

keep debugging

debug

add verbose output for unit test

When using system python, "pip install" needs root previlege. Using virtualenv to avoid this.

accelerate test and add debug info

Avoid relink executables when cmake files are changed