Bindings for CNTK library

Simple low level bindings for CNTK library from Microsoft.

Status

Currently exploring ways how to interact with C++ API nicely from Rust. Expect a lot of breaking changes.

Build scripts are not ready yet, might not work outside of 64bit linux.

Plans

• Figure out how to pass data in and out.
• Implement most of graph building functionality. Probably using some sort of code generation. Goal is to have either recurrent or seq2seq network training possible.