Existing codebase: https://github.com/takluyver/bash_kernel https://ipython.org/ipython-doc/dev/development/kernels.html https://ipython.org/ipython-doc/dev/development/wrapperkernels.html http://andrew.gibiansky.com/blog/ipython/ipython-kernels https://github.com/SciRuby/iruby
