Improved export-sets in CMake

[Alexander Neundorf]

Hi,

AFAIK there is still one feature missing in cmake which we'd really like to 
have.
Currently it is not possible to install multiple target exports from a single 
project, potentially with dependencies between each other.

I'd like to concentrate on the buildsystem in KDE in the next weeks.

So, can somebody else please try to work on this and try to get it into cmake 
2.8.9 ?

Alex