Store Ensemble objects in Output instead of its values
Cleaned up the Output class, Stage 1.

Removed a lot of member fields in the base class
	modified:   src/Outputs/

Created Entity object
	new file:   src/Entity.cpp
	new file:   src/Entity.h
	modified:   src/Distribution.cpp
	modified:   src/Distribution.h
	modified:   src/Ensemble.h
	modified:   makefile
Cleanup of the Output class, Stage 2

Removed all maps in OutputNetcdf
	modified:   src/Outputs/Netcdf.cpp
	modified:   src/Outputs/Netcdf.h
	modified:   src/Outputs/Output.cpp
	modified:   src/Outputs/Output.h

Removed variable dimension in previous commit. Forgot to fix the python
graphics.
	modified:   graphics/meteo/File.py
Cleanup of Output class, Stage 3

Add entities to Output.
	modified:   src/Outputs/Netcdf.cpp
	modified:   src/Outputs/Output.*
Changed getCdf to getDist
	modified:   namelists/default/runs.nl
	modified:   src/Drivers/Comps.cpp

Make Value an entity
	modified:   src/Value.*
	modified:   src/Qcs/Default.cpp
	modified:   src/Qcs/Qc.cpp
	modified:   src/Data.cpp

Add getP0 and getP1
	modified:   src/Distribution.*
	modified:   src/Entity.*

When p0 or p1 are missing, return missing
	modified:   src/Uncertainties/Combine.cpp
Removed unused functions in Output