- Created ribbon-http and ribbon-loadbalancer
- Removed httpasyncclient
- Refactor load balancer logic to make it based on Rx and decouple from Client APIs

Added examples sub project. Changed the serializer interface to use OutputStream. Make Response and AsyncClient extends from Closeable.

Make DynamicServerListLoadBalancer.updateListOfServers() public to provide alternative way to update servers at runtime instead of relying on scheduler.

Add new server list filter to support making only a subset of all servers available for the load balancer.

Make ZoneAwareLoadBalancer's rule object for each zone configurable. Avoid duplicated connection priming at client initialization.

renaming of NFLoadBalancer, NIWSDiscoveryLoadBalancer. Add ServerList and ServerListFilter interfaces. JUnit tests update.