v0.3.1: More customization & fixes

• New: Options name_adaptive_color, icon_adaptive_color in show option object to display the name/icon in the entity color (#67, #50)
• New: Option state_adaptive_color in entity object, to display the state in the entity color (#67)
• New: Option show_indicator in entity object, to display a color indicator next to the state (#72)
• New: Option font_size_header added (#53)
• New Added date (day/weekday) to timestamps when timeframe > 24 (#61)
• New It's now possible to set hours_to_show to float values and values lower than one.
• Changed Legend color indicators are now ciruclar instead of rectangular
• Fixed: Bar chart now shows correct amount of bars
• Fixed: Points should no longer be cut off when at the very bottom of the graph
• Fixed: Timestamps for bars
• Fixed: Missing paddings between card elements when group option was set to true
• Fixed: Unwanted overflow when border radius applied
• Fixed: Improved compatibility (#64)