Updated UI, default values and readme file

What's Changed

• Added TLS configuration as well as a script to create the required keys. by @tocosonic in #13
• Added charging threshold line by @tocosonic in #14
• removed some avg diagram lines, updated coloring by @tocosonic in #15
• More UI optimizations by @tocosonic in #16
• Added fill color for home battery charging by @tocosonic in #17
• Updated color and legend format by @tocosonic in #18
• Updated UI: added home consumption line and removed some information not required any more by @tocosonic in #19

Full Changelog: 1.5.0...1.6.0