Reverse Dependencies of extras

The following projects have a declared dependency on extras:

• cybs — Authorize.net REST API
• gear — Pure Python Async Gear Protocol Library
• lettuce-rest — BDD-style Rest API testing tool
• nodepool — Node pool management for a distributed test infrastructure
• stestr — A parallel Python test runner built around subunit
• subunit — Python implementation of subunit test streaming protocol
• ttr — Turbo test runner
• txfixtures — Treat Twisted applications as Python test fixtures
• zuul — A Project Gating System