major fix! inner tasks' commands weren't yielded/waiting for preceding command to finish.
major fix! inner tasks' commands weren't yielded/waiting for preceding command to finish.

running a double generator loop is tricky. luckily, Node V8 (node 0.11+) supports for..of, which doesnt drop context of parent generator

lukeed/taskr,bucaran/fly,lukeed/taskr,lukeed/taskr