Prettified output

 - The host now appears in magenta. 

 - When starting a task, it prints the task id without color.
   The line will turn red on failure and green on success, presenting a X or check

See: https://www.dropbox.com/s/i64aupf4xd92x4p/Screenshot%202014-05-07%2011.24.24.png
Merge pull request #9 from rzurawicki/master

Prettified output