removed parameter-name to avoid compiler warning
Specify full path in #include.

This is required for an upcoming application.
It was already discussed in #89 and will come up
with more changes as the application grows. So
step by step all #includes will have the full
paths prepended.
[IO] Clarify which mesh file was read.
[ML] Specify full path for some includes.
Consistent copyright year 2012-2014.
Empty GroundwaterFlowProcess and its Base classes.
[PL] Add ProcessLib to CMake files.
Add ProcessLib to doxygen inputs.
[PL] Add virtual initialize().
[PL] Add number of node variables.

Element variables are not yet used.
[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] Remove MeshComponentMap include from GW.
[PL] Add dof_map to GroundwaterFlow.
Merge branch 'Cleanup' into develop
Merge branch 'Replace_Process_BC_IC_Vars' into develop

Conflicts:
	FileIO/XmlIO/Boost/BoostXmlCndInterface.cpp
	FileIO/XmlIO/Boost/BoostXmlCndInterface.h
	OGS/BoundaryCondition.cpp
	OGS/BoundaryCondition.h
	OGS/DistributionInfo.cpp
	OGS/DistributionInfo.h
	OGS/FEMCondition.cpp
	OGS/FEMCondition.h
	OGS/InitialCondition.cpp
	OGS/InitialCondition.h
	OGS/ProcessInfo.cpp
	OGS/ProcessInfo.h
	OGS/SourceTerm.cpp
	OGS/SourceTerm.h