Tiny doc fix

Helping the copy / paster peeps with the right include :)
Merge pull request #18 from tissak/master

Tiny doc fix
Merge pull request #19 from jedisct1/master

The Map and Collection traits are gone.
Converted the library to use FromError
Heavily refactored exceptions.
Made a signature a bit nicer.
Fixed up the example.
Removed unwrap from examples
throw -> fail because this is not an exception.
Converted more examples away from unwrap
Added support for IoError causes.
Updated readme
Fixed port of example
Clarified comment in readme
Removed old makefile command
Update TCPStream constructor for rust-nightly