Add a Gitter chat badge to README.md
Created by: gitter-badger
thephoeron/let-over-lambda now has a Chat Room on Gitter
@thephoeron has just created a chat room. You can visit it here: https://gitter.im/thephoeron/let-over-lambda.
This pull-request adds this badge to your README.md:
If my aim is a little off, please let me know.
Happy chatting.
PS: Click here if you would prefer not to receive automatic pull-requests from Gitter in future.