QML Observer: Build together on runtime with debugging tools

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

Reviewed-by: hjk

src/libs/qmljs/qmljsmodelmanagerinterface.h

@@ -76,6 +76,7 @@ public:
         QPointer<ProjectExplorer::Project> project;
         QStringList sourceFiles;
         QStringList importPaths;
+        QString qmlDumpPath;
     };
 
     class WorkingCopy