• Allow query by code point even if Python’s unicodedata.name()
  does not know the character
• Also read names from emoji-sequences.txt and emoji-zwj-sequences.txt
• itb_emoji.py: Also read emoji-sequences.txt (from unicode.org)
• Fix positioning of info popover (fix a typo in an “if” statement)
• Show emoji properties from unicode.org when debugging is on
• itb_emoji.py: Also read emoji-zwj-sequences.txt (from unicode.org)
• Also use the emoji properties from unicode.org to decide whether
  to offer a lookup on emojipedia
• Use property “Emoji_Modifier_Base” from emoji-data.txt to check
  whether an emoji supports skin tones
• itb_emoji.py: Also read emoji-data.txt (from unicode.org)
• Tentative skin tone support for families
• Improve skin tone support: make it work for professions (roles) as well
• Make skin tone popover scrollable and limit its maximum size