README: Add #smack IRC badge from kiwiirc
README: Add #smack IRC badge from kiwiirc

andrey42/Smack,Flowdalic/Smack,igniterealtime/Smack,igniterealtime/Smack,esl/Smack,annovanvliet/Smack,vanitasvitae/smack-omemo,vanitasvitae/smack-omemo,vanitasvitae/Smack,andrey42/Smack,annovanvliet/Smack,andrey42/Smack,annovanvliet/Smack,esl/Smack,igniterealtime/Smack,vanitasvitae/Smack,vanitasvitae/Smack,Flowdalic/Smack,vanitasvitae/smack-omemo,Flowdalic/Smack,esl/Smack