Minor changes

Fix the problem that ByteBuf resulted from Hystrix blocking call cannot be accessed

Fix the problem that ByteBuf resulted from Hystrix blocking call cannot be accessed due to refcount issue. Added the listener capability to all transport clients.

Fix the connection problem from load balancer. Changes to use latest RxNetty API for content

Rename addCacheProvider to withCacheProvider and remove the list implementation

Conflicts:
	build.gradle

More changes in proxy to use the Observable API for content.

Fix the problem that load balancer operator does not automatically unsubscribe when the actual observer unsubscribe. Changes to use new RxNetty API to use Observable for content.

Minor changes and optimization

Conflicts:
	ribbon-transport/src/main/java/com/netflix/client/netty/http/NettyHttpClient.java
	ribbon-transport/src/test/java/com/netflix/client/netty/http/NettyClientTest.java

Added functionality to create SSLContext for netty clients.

Ribbon transport based example + examples cleanup.

Clean up: Remove extra handling of 503 response from NettyHttpClient, simplified logic in LoadBalancerExecutor, restore and deprecate getEntity(TypeToken) in HttpResponse for backward compatibility, renamed a few APIs, change default retry next server configuration to be 1.

Conflicts:
	gradle.properties
	ribbon-transport/src/main/java/com/netflix/client/netty/http/NettyHttpClient.java

Write README.md and instructions in javadoc.

Conflicts:
	gradle.properties

IClientConfig related API changes

Changed IClientConfig interface. Move ClientConfigBuilder to be an inner class of IClientConfig. Added example of load balancing using URLConnection.

Rename @Http.path to @Http.uriTemplate.

Add template example similar to the proxy one.

Ribbon proxy cleanup. Add support for byte array.

Minor changes and improvements for ribbon

Create new "ribbon" module

Make Http method mandatory. Move template classes to package private. Added checking of inputs in HttpRequestBuilder. Added JUnit test for Hystrix request cache.

Rename module ribbon-client-extensions to ribbon and rename Java packages