Merge pull request #65 from TomFischer/Mesh2MeshPropertyInterpolation

Mesh2 mesh property interpolation
Using logog logging within class GEOObjects.
Using logog logging within class template Grid.
Using logog logging within class Polyline.
Using logog logging within class Surface.
Using logog logging within class Color.
Using logog logging within class Raster.
Using logog logging within class PointVec.
Using logog logging within class Polygon.
Using logog logging within class QuadTree.
Changed SensorData::addTimeSeries() and used logog logging within class SensorData.
Using logog logging within classes Station and StationBorehole.
Removed unused include Color.h from class GEOObjects.
Added include fstream to XMLInterface.h.
Reducing include dependencies and mem leak in VtkPointsSource.
Reducing include dependencies in class VtkPolylinesSource.
Reduced include dependencies in file VtkStationSource.h.
Reduced include dependencies in files VtkConditionSource.{cpp,h}.