Create HTTP Client API

[salmanahmad]

Example code can be seen here:

https://github.com/netty/netty/blob/master/example/src/main/java/io/netty/example/http/snoop/HttpSnoopClientHandler.java

[salmanahmad]

I think I may need to modify the Connection class to make it aware of client / server connections.

[salmanahmad]

I am going to add readHead along with writeHead. There is actually some of parallels between the different APIs. readHead is only available for client connections and likewise writeHead is only available for server connections.

[salmanahmad]

Mostly updated and added as of 046ee9eec84c1ee83b250b435a0ae43217dbef18. There are a couple of rough edges with the API.

• There are no nice convenience functions for simple GET and POST requests.
• Attempts to connect to a non-existent host (for example, on a port that is not being listened on) causes the client to hang
• There is no nice support for common encoding types including application/x-www-form-urlencoded and multipart/form-data
• Chunked encoding has not been tested
• Keep Alive has not been tested