some code cleanup,
updated labels when in batch mode to follow up the QGis HIG guideline
git-svn-id: http://svn.osgeo.org/qgis/trunk@14963 c8812cc2-4d05-0410-92ff-de0c093fc19c
fix in translate to use the GdalTools_utils to get the crs,
managed invalid extent in merge tool
git-svn-id: http://svn.osgeo.org/qgis/trunk@14450 c8812cc2-4d05-0410-92ff-de0c093fc19c