Additional work on batch processing

scriptengine.h

@@ -26,6 +26,7 @@ public:
     void reportError(const QString &message);
     const QString& outputDir() const;
     void interrupt();
+    void logError(const QString &message);
     Q_INVOKABLE void log(const QString &message);
     Q_INVOKABLE void mark(File *file);
     Q_INVOKABLE void unmark(File *file);
@@ -33,7 +34,7 @@ public:
 public slots:
     void run();
 signals:
-    void newMessage(const QString &message);
+    void newMessage(const QString &message, bool error);
     void finished();
 };
 
@@ -49,7 +50,7 @@ public:
     void start();
     void interrupt();
 signals:
-    void newMessage(const QString &message);
+    void newMessage(const QString &message, bool error);
     void finished();
 };
 
@@ -62,6 +63,7 @@ class File : public QObject
     bool _fitsKeywordsLoaded = false;
     QMap<QString, QString> _fitsKeywords;
     void loadFitsKeywords();
+    bool mkpath(const QString &path) const;
 public:
     explicit File(const QString &path, ScriptEngine *engine);
     Q_INVOKABLE QString fileName() const;