This reverts commit 33dd9dea.

Note: as for qt projects, this is also used for running. And we don't
use it for running cmake yet.

Hopefully i didn't miss a plugin.

Details:  That fixes a few bugs, while still having a few missing
things. Don't allow the user to set a shadow build directory, if there
is already a in source build. Detect if a cbp file is already existing
and recent enough, don't rerun cmake then. Ensure that the user runs
cmake with the cbp generator on opening the project. Show the output of
the cmake generator while running. Remove the unecessary cmake step.

Details:  Add a dialog asking for command line options and build
directory. This dialog pops up if you don't have a .user file. Note,
though that it also pops up if there is already a in source build.
(The build directory lineedit should be read only then.)
The cmake button in that dialog and the output pane need more polish to
make them better. With those changes you can now build and run marble
from Qt Creator. (For marble you need to pass a few options to cmake.)

Also add a configuration page to the Tools/Options dialog, where you can
specify the cmake executable path.

And add a class which runs cmake in the background to find out which
version and wheter that cmake version has Qt Creator generator. (Which I
did begin to write.)

Details:  There's a linedit on there, we restore and save the settings,
only thing missing is actually using it.

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.

Details:  Also add copyright headers and some initial code for the
CMakeStep and MakeStep. Soon it will actially build something.

Details:  Another dummy, still more to do.