Much needed refactoring and code cleanups in PAL.

Removed temporary "Feat" class used for conversion of geometries from GEOS.
Renamed "Feature" class to FeaturePart as it only represents on feature part.
Added Feature class which contains common properties among feature parts.
Greatly simplified registration of features in Layer.
Simplified Layer interface.


git-svn-id: http://svn.osgeo.org/qgis/branches/symbology-ng-branch@11207 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: wonder

src/core/pal/costcalculator.cpp

@@ -129,7 +129,6 @@ namespace pal
     // center
     //cost = feat->getDistInside((this->x[0] + this->x[2])/2.0, (this->y[0] + this->y[2])/2.0 );
 
-    lp->feature->fetchCoordinates();
     pCost->update( lp->feature );
 
     PointSet *extent = new PointSet( 4, bbx, bby );
@@ -144,7 +143,6 @@ namespace pal
 
     lp->setCost( pCost->getCost() );
 
-    lp->feature->releaseCoordinates();
     delete pCost;
   }