Add optional prettyDescription to Job.

src/libcalamares/Job.cpp

@@ -1,6 +1,6 @@
 /* === This file is part of Calamares - <http://github.com/calamares> ===
  *
- *   Copyright 2014, Teo Mrnjavac <teo@kde.org>
+ *   Copyright 2014-2015, Teo Mrnjavac <teo@kde.org>
  *
  *   Calamares is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -87,4 +87,11 @@ Job::~Job()
 {}
 
 
+QString
+Job::prettyDescription() const
+{
+    return QString();
+}
+
+
 } // namespace Calamares

src/libcalamares/Job.h

@@ -1,6 +1,6 @@
 /* === This file is part of Calamares - <http://github.com/calamares> ===
  *
- *   Copyright 2014, Teo Mrnjavac <teo@kde.org>
+ *   Copyright 2014-2015, Teo Mrnjavac <teo@kde.org>
  *
  *   Calamares is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -64,6 +64,7 @@ public:
     virtual ~Job();
 
     virtual QString prettyName() const = 0;
+    virtual QString prettyDescription() const;
     virtual JobResult exec() = 0;
 signals:
     void progress( qreal percent );