Stripped Connection header to ensure connection pooling even when the client sends a Connection: close
Added decrementation for client-open-connections counter
Added dynamic configuration for default-host-header
Set the right uri + Host header when forwarding a message
Added tests for SprayUtils
Used NRV's Logging trait instead of manually creating loggers
Minor changes after review
Using a lowercased Set for strippedHeaders
Merge pull request #5 from wajam/clement-nlb

Various fixes and improvements