Cleanup qbs project manager .h files.

Forward QBS releted classes.

Change-Id: I69ebb8e5aca9c8534392deb5ce805d6c711f9c4e
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/qbsprojectmanager/qbsproject.h

@@ -32,9 +32,6 @@
 
 #include "qbsprojectmanager.h"
 
-#include <language/language.h>
-#include <tools/buildoptions.h>
-
 #include <projectexplorer/project.h>
 #include <projectexplorer/projectnodes.h>
 #include <projectexplorer/task.h>
@@ -51,6 +48,12 @@ class CleanJob;
 class Error;
 class ProjectData;
 class SetupProjectJob;
+class CleanOptions;
+class InstallJob;
+class InstallOptions;
+class Project;
+class ErrorInfo;
+class BuildOptions;
 } // namespace qbs
 
 namespace Core { class IDocument; }

src/plugins/qbsprojectmanager/qbsprojectmanager.h

@@ -34,7 +34,10 @@
 
 #include <projectexplorer/iprojectmanager.h>
 
-#include <qbs.h>
+namespace qbs {
+class Settings;
+class Preferences;
+} // namespace qbs
 
 #include <QString>