Multiple changes

Added new class Relation. Populations will now have a list of
these instead of the list of reaction lists.

Header guards added. General cleanup in unknown quantities.

	modified:   Makefile
	modified:   parameter.h
	modified:   population.cpp
	modified:   population.h
	modified:   randomGenerator.h
	modified:   reaction.h
	new file:   relation.cpp
	new file:   relation.h
	modified:   specie.cpp
	modified:   specie.h
	modified:   totalPopulation.cpp
	modified:   totalPopulation.h
	modified:   types.h
Diagram is updated