Add gitter link to README
Add gitter link to README
pombredanne/grumpy,aisk/grumpy,google/grumpy,S-YOU/grumpy,aisk/grumpy,S-YOU/grumpy,m4ns0ur/grumpy,trotterdylan/grumpy,corona10/grumpy,google/grumpy,corona10/grumpy,trotterdylan/grumpy,m4ns0ur/grumpy,pombredanne/grumpy