battery

[marvinbanda]

battery analysis tool

issue #629

[Baalmart]

Thanks @marvinbanda for this PR.

A few notes for your consideration...

1. Our system is split into backend and frontend -- which makes it a 2 tier architecture, this particular repository is for our backend, so we do not expect frontend code here.
2. You need to divide your solution into backend (API) and frontend accordingly. This approach ensures re-usability of your solution in many other areas.