Add coverage task.
Add coverage task.

pombredanne/binaryornot,hackebrot/binaryornot,0k/binaryornot,hackebrot/binaryornot,pombredanne/binaryornot,audreyr/binaryornot,hackebrot/binaryornot,audreyr/binaryornot,audreyr/binaryornot,pombredanne/binaryornot,0k/binaryornot