h5py FutureWarning 问题修复

h5py/init.py:36: FutureWarning: Conversion of the second argument of issubdtype from float to np.floating is deprecated. In future, it will be treated as np.float64 == np.dtype(float).type.
from ._conv import register_converters as _register_converters

h5py 和 numpy 版本冲突，h5py 官方已修复合并到 master 分支，但是还没发新版，在发版之前可以用降级 numpy 的方法跳过这个问题。降级命令如下：

pip install numpy==1.13.0

referece:
https://stackoverflow.com/questions/48340392/futurewarning-conversion-of-the-second-argument-of-issubdtype-from-float-to