[GeoLib] Corrected documentation.
[GeoLib] Test for merging geometries with names.
[GeoLib] SimplePolygonTree: added method getNChilds().
[FileIO] GMSHPolygonTree: corrected the case the recursion reached the leafes.
Merge pull request #307 from TomFischer/BugFixGMSH

GMSH: include stations information into the mesh