- QgisInterface's functions addRasterLayer/addVectorLayer return pointer to layer instead of just bool

- renamed QgisApp::addLayer to more appropriate QgisApp::addVectorLayer
- cleanups in loading of raster/vector layers in QgisApp


git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@8055 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: wonder

python/gui/qgisinterface.sip

@@ -36,11 +36,9 @@ class QgisInterface : QObject
     virtual void zoomActiveLayer()=0;
 
     //! Add a vector layer
-    virtual bool addVectorLayer(QString vectorLayerPath, QString baseName, QString providerKey)=0;
+    virtual QgsVectorLayer* addVectorLayer(QString vectorLayerPath, QString baseName, QString providerKey)=0;
     //! Add a raster layer given a raster layer file name
-    virtual bool addRasterLayer(QString rasterLayerPath)=0;
-    //! Add a raster layer given a QgsRasterLayer object
-    virtual bool addRasterLayer(QgsRasterLayer * theRasterLayer, bool theForceRenderFlag=false)=0;
+    virtual QgsRasterLayer* addRasterLayer(QString rasterLayerPath, QString baseName = QString())=0;
 
     //! Add a project
     virtual bool addProject(QString theProject)=0;