Version 1.7: works with MW 1.23+

Also includes two new themes, Stellarbook (for Monobook) and Dark (for
Vector).

Bug: 66508

ShoutWiki SVN revisions: r2413, r2414, r2557, r2575

r2557 was originally committed by Cook879 (<cook879{ at }shoutwiki{ dot
}com>)

Special thanks to MatmaRex for the actual MW 1.23+ fix (r2575)

Change-Id: I47c591dedb6366953fba32f9b91414b386db8ac7