New package heirarchy.

Also renamed CombinedTrade to FullTrade as that is more descriptive.

Eventual goal is to spin off com.dustyneuron.txmarket into a seperate library.
Mixer has worker thread to auto run trades
Removed protobuf Trade as it wasn't needed
Blind outputs generate a new address

A new address is generated for every trade *attempt*, as re-using an address for multiple attempts would tell people who we were.
version 0.2