Improve TaskList plugin

* Automatically reload task lists.
 * Add task handler to stop the reloading
 * Add some really simple API for other plugins to use.

src/plugins/tasklist/taskfilefactory.h

@@ -32,18 +32,22 @@
 
 #include <coreplugin/ifilefactory.h>
 
+#include <coreplugin/ifile.h>
+
 #include <QtCore/QStringList>
 
+namespace ProjectExplorer {
+class Project;
+} // namespace ProjectExplorer
+
 namespace TaskList {
 namespace Internal {
 
-class TaskListManager;
-
 class TaskFileFactory : public Core::IFileFactory
 {
     Q_OBJECT
 public:
-    TaskFileFactory(TaskListManager *manager);
+    TaskFileFactory(QObject *parent = 0);
     ~TaskFileFactory();
 
     QStringList mimeTypes() const;
@@ -52,10 +56,13 @@ public:
     QString displayName() const;
 
     Core::IFile *open(const QString &fileName);
+    Core::IFile *open(ProjectExplorer::Project *context, const QString &fileName);
+
+    void closeAllFiles();
 
 private:
-    TaskListManager * m_manager;
     QStringList m_mimeTypes;
+    QList<Core::IFile *> m_openFiles;
 };
 
 } // namespace Internal