add appcast checksum in fastscripts
add appcast checksum in manico
add appcast checksum in meerkat
add appcast checksum in meocloud
add appcast checksum in propresenter
add appcast checksum in rubitrack
add appcast checksum in strongvpn-client
Merge pull request #6988 from rolandwalker/add_appcast_checksums

Add appcast checksums for 7 Casks