pip安装失败？

hi,dear大佬
我想用pip直接安装，发现错误，
```
pip install euler-gl
ERROR: Could not find a version that satisfies the requirement euler-gl (from versions: none)
ERROR: No matching distribution found for euler-gl
```

py3.7,
tf-gpu1.15
Ubuntu16.04

Start by reproducing `pip install euler-gl` with Python 3.7, TensorFlow GPU 1.15, and Ubuntu 16.04. The issue names no files or tests, so inspect the project's package and installation entry points; done means the supported installation path or the cause of the unavailable package is documented and verified.

Written by the indexing model from the issue text.