GPII-702, GPII-771: Make the snapshotter smarter

This patch reads a list of solutions (only those for Windows and GNOME) and generates a list of choices for which the settings should be snapshotted. Andy did all the hard work on this; I tested it, added the names for the solutions and ordered them by OS.
Merge pull request #8 from cstrobbe/patch-3

GPII-702, GPII-771: Make the snapshotter smarter