Three minor changes:

- Adjust code to new RegionalMinimaFilter methods
- Add error control for the number of images open
- Allow calling the priority queue implementation from the simple process method
new plugin to perform geodesic reconstructions in 3d (it works as well in 2d)
Finish methods to do geodesic reconstruction by dilation.

Two methods are implemented, queue-based and hybrid. The hybrid implementation is much faster.
Added class to find regional maxima in an image.

This class was needed for the queue-based implementation of the geodesic reconstruction by dilation.
Remove the PlugInFilter interface from the definition of the class.

It was not used anywhere.
Add the geodesic reconstruction plugin in the config file