New Features
* 11 Communicate voltage to SpatialKappa
* KappaNEURON can now be installed with `pip`: See commit: https://github.com/davidcsterratt/KappaNEURON/commit/f170a33db42e40748cd656a965ab7ffe6d54b441
Bug fixes
* 9 Get KappaNEURON working with NEURON 7.4 - KappaNEURON was working with a development version of NEURON
* 10 Initial value changes only after first timestep
* More minor fixes in resopnse to user testing
Code changes
* The code has been refactored in places, using the the updated SpatialKappa 2.1.3 interface to try to separate the model setup and initialisation and running more cleanly