If no 'qmlviewer' executable is found in the PATH, iterate through the
list of configured Qt versions and try to find a qmlviewer there. This
should help users configuring creator such to play with Qml.

Right now the first qmlviewer found in a Qt version is selected. A UI
to let the user select one explicitly was not possible any more (string
freeze).

This requires a dependency from QmlProjectManager to
Qt4ProjectManager.

Reviewed-by: dt

 * Revert this once string freeze is over!

 * Add test for build- and sourcedirectories being at different levels

Reviewed-by: dt

 * Add function to check whether the new symbian build system is used
   to build a Qt version. This will be used to decide which parsers
   to use when building for symbian

make it an argument of the main entry point instead of a property

the latter does too much

 - lessens open file handles
 - improves help plugin startup further

Task-number: QTCREATORBUG-337
Reviewed-by: ck

 * Make this more reliable and faster using less code.

Reviewed-by: dt

Task-Nr: QTCREATORBUG-1411

Reviewed-by: dt

This boils down to the same problem as other calls to qmake, if we don't
pass the target mode, qmake will prepend the current platform as target.
Reviewed-by: dt

This boils down to the same problem as other calls to qmake, if we don't
pass the target mode, qmake will prepend the current platform as target.
Reviewed-by: dt

Reviewed-by: Alessandro Portale

Try to find matching version for mkspec.
Rubber-stamped-by: Joerg Bornemann <qtc-committer@nokia.com>

Reviewed-by: dt

Handle qmake with or without trailing .exe on windows. Looks like the
extension got lost recently in the generated Makefiles.

Reviewed-by: dt

Reviewed-by: dt

Reviewed-By: hunger

Reviewed-by: dt

This patch marks up invalid Qt versions as Desktop.

Make sure we add a the always existing invalid Qt version in the path
available in the targetselectionpage if no valid Qt versions could be found.

This way a project can be set up and loaded without a valid Qt version set up.
Trying to build this will fail of course. This is basically how we handled
this situation before we had targets, too.

Task-number: QTCREATORBUG-1066
Reviewed-by: dt

This reverts commit b1a121c5.

Accidentally pushed the linux icc parser before it was ready.

Conflicts:

	src/plugins/qt4projectmanager/qtversionmanager.cpp

That means wrong target (though argueable we don't have a correct one
yet, but working defines and includes.

Fixes creating these pages unnecessarily when the Welcome plugin is not
loaded, as well as "leaking" them in that case.

Reviewed-by: con