baloo and kfilemetadata unstable now in frameworks

[Harald Sitter]

plasma/kfilemetadata -> frameworks/kfilemetadata
plasma/baloo -> frameworks/baloo

unstable branch was removed from the plasma repositories
stable branch was removed from the frameworks repositories

KCI should switch the builds accordingly whenever it decides to build them again

plasma initial upload should no longer attempt to use any of the two.
frameworks OTOH should.

unstable branch should be good to go as per integration in plasma,
soversions might be off (<5) that's not really a problem though as I
think I tracked ABI breakage from stable to unstable anyway.

I also adjusted the control vcs/homepage and watch file accordingly

HS