v0.2.1: Fixes & multiple states

• Added: New hour24 option to choose time format between 12-hour/24-hour clock

• Added: Support for showing multiple sensor states, see new show_state option for the entity object (#33)

• Added: Ability to press/click on entities in the graph legend to bring up their "more info" dialog (#31)

• Fixed: Responsive design of the graph legend

• Fixed: NaN values in extrema (#34)

• Fixed: Extrema not rendering (#32)

• Fixed: Times on points going backwards (#30)