Reviewed-by: Kai Koehne

- Report errors correctly.
- Do not pass empty target argument to qmake
- Give 'make' a longer timeout and change timeout checking to
  trigger after last output line was obtained from process
- Make build log dialog non-modal and ensure it pops up on failure
  even if a different Qt version was selected in-between
- Disable Rebuild-button while build is running.

Reviewed-by: Kai Köhne <kai.koehne@nokia.com>
Reviewed-by: Lasse Holmstedt <lasse.holmstedt@nokia.com>

Reviewed-by: Kai Koehne

We're using a QObject property to get the Qt Version Id: QmlDumpTool
is in Qt4ProjectManager, which shouldn't have a dependency to QmlProjectManager.

Reviewed-by: Christian Kamm

4.7.1 won't come with private headers always being installed.

Reviewed-by: ckamm

Should stop qmldump processes from showing up in the MacOS dock.

Reviewed-by: Lasse Holmstedt

Otherwise, users might only see parts of the build that succeeded, but
not the failed ones (depending on build order).

Reviewed-by: ckamm

Task-number: QTCREATORBUG-2575
Reviewed-by: Kai Koehne

Task-number: QTCREATORBUG-2563
Reviewed-by: Kai Koehne

To make it work with 4.7.0 developer builds.

Reviewed-by: owolff

To make plugin dumping work without having to compile the debugging
helpers explicitly.

Reviewed-by: Kai Koehne

The location private includes might still change with 4.7.1 . Better
check the qt version string.

Reviewed-by: Lasse Holmstedt

Discussed-with: fkleint

Reviewed-by: Erik Verbruggen

Reviewed-by: hjk

Moved qmljsdebugger to a dir under qml/, made qmlobserver compile
without creator dependencies and made it compile with debugging
helpers.

Reviewed-by: hjk

Must be compiled during runtime - otherwise, the app may not work
with Qt that is compiled with another compiler.

Reviewed-by: hjk