Create our own hash method to replace mmh3

[jalew188]

As mmh3 depends on compiling system (e.g. Visual Studio in Windows) as its core is written in C/C++, it is better to write our own hash method using numba to replace mmh3.

See pypa/pip#8657

[jalew188]

Check the source code of mmh3:
https://github.com/hajimes/mmh3/blob/master/MurmurHash3.cpp#L260

[jalew188]

solved in PR #79