Suggestion for Pypi information

[HowcanoeWang]

It does an amazing job for Python point cloud analysis! You know that almost 90% of PCL python library depends on C++ PCL which is really really really difficult to install and hard to pack them in the product (GUI application etc.). Your library solved this problem, awesome!

I just missed this good library when I search in Pypi. I think it may be a good idea if you strengthen this is a pure python library without C++ dependency and PCL library in the Pypi introduction!

Thanks again for your great contribution! Hoping in the future, this library can include more useful funcions.

[cmpute]

I'm sorry that I have to change the library back to C++ implementation because there are tooooo many existing functions to reimplement! And I definitely won't have that much time to spend on this. I hope the cython wrapping will offer a smooth experience over existing C++ codes.

In terms of PCL installation, it's easy to install both on Linux and Windows now. On linux you can just sudo apt install libpcl and on windows you can use vcpkg. If you have other installation requirements, I can offer python wheels.