Merge pull request #1 from gitter-badger/gitter-badge

Add a Gitter chat badge to README.md

+# openprocurement.robottests.buildout
+
+[![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/openprocurement/openprocurement.robottests.buildout?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
\ No newline at end of file