CitizenWatt-refactor

This is an updated version of CitizenWatt code, aiming to be a backup of available stuff, with minor updates for anyone willing to build its own.

CitizenWatt aimed at building a personal DIY energy consumption meter, inspired by OpenEnergyMonitor.

I recently came across cloned CitizenWatt repositories and wanted to make some lifting of the code, while I set it back in place at home. I also found out that OpenEnergyMonitor was considerably nicer than it used to be, especially from a UX point of view. This aims at being an up to date merge of OpenEnergyMonitor and CitizenWatt, to be the best combination possible at the moment, in my opinion.

This is part of a home automation process, hence the will to avoid installing pre-compiled images which are not easily extensible.