Update to Rust master
Implement simple negotiation protocol
Implement client negotiation

Separate out protocol header code into libsplice, and implement a simple
negotiation protocol for the client
Correct definition of auth_file_secret

auth_file_secret now correctly accepts a TcpStream to authenticate. File
secret authentication, however, remains unimplemented.
Update to Rust master
Add rust-toml to clean rule
Depend on ncurses binding for editor
Update to Rust master

Stop building tests and examples for rust-toml for now. They do not
propperly track Rust master.