#42 Add a Gitter chat badge to README.md

Originally at 2015-01-11T18:55:14Z by The Gitter Badger closed at 2015-01-12T15:33:00Z (pull request) ### amber-smalltalk/amber-documentation now has a Chat Room on Gitter @sebastianconcept has just created a chat room. You can visit it here: [https://gitter.im/amber-smalltalk/amber-documentation](https://gitter.im/amber-smalltalk/amber-documentation?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&content=body_link). This pull-request adds this badge to your README.md: [](https://gitter.im/amber-smalltalk/amber-documentation?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=body_badge) Happy chatting. PS: [Click here](https://gitter.im/settings/badger/opt-out) if you would prefer not to receive automatic pull-requests from Gitter in future.