Add support for compression/decompression of HTTP request/responses

[NiteshKant]

Compression/decompression of HTTP request/responses is a pretty common requirement for HTTP client and servers. It is somewhat complex to use the netty's stock HttpContentCompressor and HttpContentDecompressor with RxNetty because of the way we write HTTP content (as a ByteBuf instead of HttpContent) on a request/response.

This issue is to provide methods like compressRequest() and decompressResponse() on the HttpClient and decompressRequest() and compressResponse() on HttpServer

[jamesgorman2]

Hey Nitesh, is this is the pipe for you? We're going to be looking at getting some of our traffic coming and going from RxNetty compressed in the next month or so this will be on our radar and can drop some PRs if you're not going to get to it by then.

[NiteshKant]

@jamesgorman2 nope I am not working on it, all PRs are welcome :)

[jamesgorman2]

Cool, I'll stick a proposal in here shortly to expand one your notes