irkerd: Split imported modules onto their own lines

irkerd: Split imported modules onto their own lines

Following PEP 8 [1]:

  Imports should usually be on separate lines, e.g.:

    Yes: import os
         import sys

    No:  import sys, os

This also makes it easier to read diffs that add and remove imports,
since you won't need a word-diff to see exactly what changed.

[1]: http://legacy.python.org/dev/peps/pep-0008/#imports

Conflicts:
	irkerd