README.md: use KiwiIRC instead of freenode webchat (#84)
README.md: use KiwiIRC instead of freenode webchat (#84)

Freenode webchat uses ancient qebirc which very likely drives people
away by being so ancient. Kiwi again is modern IRCv3 capable web IRC
client and the difference is very clear.
warbaque/teleirc,FruitieX/teleirc