- fixed bug in solar recharge percentage computation
- added recharge at the end of the year to have the same battery level
at the start and end of the year
- added battery and charger efficiency simulation
- using kWh price (without counting subscription)
- using a <div> container instead of an <iframe> (simplifies the build
system, avoids the quirks iframes)
- Bulma CSS is encapsulated in the #simulator ID to avoid polluting the
rest of the page, as well as increasing the chances to override the page
CSS