cppnanomsg: C++ binding for nanomsg library

To build:

1. git clone git@github.com:nanomsg/cppnanomsg.git
2. cd cppnanomsg
3. mkdir build
4. cd build
5. cmake ..
6. make
7. make test
8. sudo make install

Alternatively, given that the binding consists of a single header file, rather than installing it, you can avoid dependency and make nn.hpp part of your project.