Maintenance TensorLayer 1.7.1

This is an incomplete list among the many features added.

• New Example

  • Float 16 half-precision model, see tutorial_mnist_float16.py by @zhonghao
  • Data augmentation for object detection by @zsdonghao

• New Support

  • tl.prepro.obj_box_coord_upleft_butright_to_centroid by @zsdonghao

• New Update

  • Fix bug of DeformableConv2dLayer by @vyokky
  • BatchNormLayer supports float 16 c99a6a2 by @zsdonghao

• Documentation by @vyokky @zsdonghao