ownership, concurrency and and destructor for parser backend manager and

cherry picked:
smurfy/fahrplan#269

src/fahrplan_backend_manager.cpp

@@ -26,6 +26,14 @@ FahrplanBackendManager::FahrplanBackendManager(int defaultParser, QObject *paren
     currentParserIndex = defaultParser;
 }
 
+FahrplanBackendManager::~FahrplanBackendManager()
+{
+    if (m_parser) {
+        // Parser object will be autodeleted after the thread quits.
+        m_parser->quit();
+    }
+}
+
 QStringList FahrplanBackendManager::getParserList()
 {
     QStringList result;
@@ -73,7 +81,7 @@ void FahrplanBackendManager::setParser(int index)
         m_parser->quit();
     }
 
-    m_parser = new FahrplanParserThread();
+    m_parser = new FahrplanParserThread(this);
     m_parser->init(index);
 
     // Init can fallback to another index if its invalid.

src/fahrplan_parser_thread.h

@@ -91,7 +91,7 @@ public slots:
   void run();
 
 private:
-  bool m_ready;
+  volatile bool m_ready;
   int  i_parser;
 
   QStringList m_trainrestrictions;

src/parser/parser_abstract.cpp

@@ -67,7 +67,7 @@ ParserAbstract::ParserAbstract(QObject *parent) :
 
 ParserAbstract::~ParserAbstract()
 {
-    //clearJourney();
+   clearJourney();
     delete requestTimeout;
     delete NetworkManager;
 }