added tin export to single geometry conversion
put tin export into extra function to avoid code duplication
put tin export into extra function to avoid code duplication
[FileIO/Legacy] Using two spaces instead of tabs.
resolved merge conflicts
removed surface creation from closed polylines
Merge pull request #492 from rinkk/TINConversionSingleGeometries

TIN conversion for single geometries
[AL] Correct indentation.
[PL] Add mesh subset to initialize().
[PL] Initialize MeshSubsets and MeshComponentMap.
[PL] Rename mesh_items_all_nodes; items->subset.
[PL] Add destructor for GroundwaterFlowProcess.
[PL] Move mesh_component_map to class variables.

...from the initialize().
Also delete it in the dtor.
[PL] Add createDofMap() in Process.
[PL] Use number of node's DOF in createDOFMap().
[PL] Remove MeshComponentMap include from GW.
[PL] Add dof_map to GroundwaterFlow.
[PL] Empty solve().
[PL] Add empty GroundWaterflowFEM.
[PL] Add initialize debug message.