Incorporate into qmljsdebugger-lib.pri

Task-number: QTCREATORBUG-2951

This allows using the qmlviewer of a Simulator Qt version. It also
builds and uses the qmlobserver when debugging.

Reviewed-by: Kai Koehne

I wasn't able to get it working on Mac OS X: Putting it on top
of the QGraphicsView doesn't work because Cocoa doesn't allow a
widget to be on top of OpenGL viewport. Embedding it as a
QGraphicsProxyWidget produces lots of Cocoa warnings (raster engine related).

Anyhow, the same widget shows up in the Debugger/Observer tab of
Qt Creator.

Reviewed-by: Lasse Holmstedt

The specified images in the resources weren't part of the qmlobserver,
and therefore 'tinting' then resulted in QPainter errors.

Task-number: QTCREATORBUG-2562
Reviewed-by: Lasse Holmstedt

- 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>

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

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

Copy over the private header files to creator source tree, along the
lines of the what the designer plugin does.

Reviewed-by: Christiaan Janssen

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

Reviewed-by: Lasse Holmstedt

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

Reviewed-by: hjk