NF: Add utils module
Merge branch 'master' into zero-padding

Conflicts:
	CHANGES.rst
BF: Support Python 2 and 3
NF: Add utils module
BF: Support Python 2 and 3
Merge remote-tracking branch 'origin/zero-padding' into zero-padding
Merge pull request #10 from hoechenberger/zero-padding

Add zero-padding function (for participant IDs)