Extended lettuce a lot. Interested in merging back or anything?

Hi @wg 
I've done some extensions to lettuce since there was no really cool java redis client. Every other library sucks in the one or other way. Your impl was the best among the others. I've upgraded commands for the latest redis support, segregated interfaces etc. I've also some time left and would like to help to maintain the best java redis client available.

What do you think?