Readme lacks installation instructions

[robert-dodier]

The readme file lacks installation instructions -- I think it would be very helpful to include that.

I was able to puzzle out that

$ python3 setup.py build
$ python3 setup.py install

are enough to build and install the package. Maybe that info, or something like it, could be in the readme.

Also, I found that after installing, import entropy_estimators fails, but import npeet.entropy_estimators succeeds. The readme mentions the former, should it contain the latter instead?

[gregversteeg]

Thanks for the comment. Sorry, I wrote this before I was very savvy about python programming. Even better would be a "pip install npeet". I will try to get someone to look at this, but it probably wouldn't happen soon. Feel free to update the documentation and I'll merge the changes.