Update README.md
Update README.md
Working on CircuitBreaker
Add AtomicBoolean and Switch
Merge pull request #154 from HCanber/atomicboolean-switch

Add AtomicBoolean and Switch
Fix Switch to use Akka.Tools.AtomicBoolean

This was due to me @hcanber adding Tools.AtomicBoolean and not seeing @rogeralsing just added one too.