Singularity changes require two commits

[blee]

This is related to #100, but I'm not sure that it's a duplicate.

Currently, turning files into singularities requires two commits: the first gets the new confman.conf into place, and the second will correctly handle the new singularity.

At the very least, this should be a documented bug for confman. It would also be nice if there was a fix that fell short of a complete redesign of singularities.