1 0 refactor

This new version of LittleProxy incorporates the following improvements:

- Fully baked Netty 4 upgrade
- Easier to use external API
- Less code
- Uses state machine internally to simplify debugging and enhancement of tcp/udt/TLS/etc. connection flow
- More unit test coverage
- More Javadoc comments
- Improved project docs (more content, updated look and feel)