This commit fixes a small bug with the regular expression used to check
the version for Multiscreen Blank. It previously had an unescaped
period, allowing for any value instead of actual periods.

This commit adjusts the naming for Multiscreen Blank, which seems to
have dropped the v2 from it's official name. The landing page and
description for the program have also been changed. Note that this
version number may be incorrect; the website lists it as 2.3.1 but the
files reference it as 2.3.0.1.

This commit moves the manifests into a folder and adds a README file
containing the list of manifests and the purpose of the repository.