Use GEOModels in ProjectData only when we build the gui version.
Added implementation to read BoundaryCondition.
Using std::string instead of QString for file name.

Wrapps readFile(QString).
[2dGWFlow] Add test program body that includes reading of mesh and geo.
[2dGWF] Added comments.
Removed definition of 'int XmlGmlInterface::readFile(std::string const&)'.
First test for reading FEM condition.
Changed signature of virtual Writer::write().
Adding MeshGeoToolsLib to FemTest project.
Using read fem conditions generating mesh node ids.
[FEMCondition] Returning const& to vector instead of a copy of the vector.
Linking 2dGroundWaterFlow with vtk and Qt in case of Gui build.
Changed constructor argument from pointer to reference.
[GEOObjects] Renamed method getGEOObject() -> getGeoObject().
[GEOObjects] Changed impl. of method getGeoObject().

Added more checks and error messages.
[GeoInfo] Reusing existing functionality.
Corrected bug searching the mesh ids.
[FEMCondition] Added initGeometricAttributes().
[BoostXmlCndInterface] Made reading/parsing of geometry tag xml more clear.
Added class MeshNodesToPoints for converting mesh nodes to geometric points for visualization.