Initial support for kde_projects.xml in kdesrc-build

[Alexander Neundorf]

On Wednesday 02 February 2011, Michael Pyne wrote:
...
> e.g. worrying about environment variables like PKG_CONFIG_PATH is no idle
> claim (kdesrc-build sets that as well), along with PATH in order to pick up
> the right Qt version.

Please try to use only CMAKE_PREFIX_PATH instead of setting PATH. I recommend 
this to everybody.
I'd also suggest not to set PKG_CONFIG_PATH, at least not to directories where 
KDE stuff is installed, this has to be found also without pkgconfig.

Alex