Adds PrePostOp and NoOp description in UML file.
+ XMLization of the Dia file (for a better use with git).
RungeKutta integrator name correction.
Merge branch 'master' into dev
Correction of the RungeKutta 4 integrator (from the output vector y point
of view).
Readds SimulationPredicate (deleted after the merge with the master 
branch).
RungeKutta 4 correction.
The call to the h function is now out of the integrator.
Simplification of SimulationPredicate elements.
Use of SimulationPredicate in simulation.
+ Correction in SimulationPredicate.
Change structure of Simulation class to have only one function having a loop
and useing SimulationPredicate.
The others "run" function call the generical loop function.
+ Corrections in SimulationPredicate.
Adds a run possibility in Rossler.cpp example file.
Delete PrePostOp objects from Simulation class declaration (there are only
used in parameter of functions).
+ Adds time get/set function.