Details:  Not yet usable, but at least you get a list of build targets now.

Task:     -
RevBy:    -
AutoTest: -
Details:  For now create only one build configuration "AllTargets",
build only the "all" target. Create runconfigurations for all targets
with option type=4

Task:     -
RevBy:    -
AutoTest: -
Details:  Note: I need to refactor the code significantly, i'm more or
less convinced that one build configuration per target is wrong.
We probably want one build configuration per build directory and instead
build all targets that we are interested then in the makestep.
This means we won't have any cmake support for the beta.

Task:     -
RevBy:    -
AutoTest: -
Details:  (Only outputs them via qDebug().)

Details:  Makes the code look better.