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We do not want to crash the whole application if only one module has a problem.

Optimitzation itself not implemented yet

[CHANGE] adapted name, order and documentation of properties ralting to the rendering of this module

Still has only one line instead of restarting when picking newly

DRY!

[ADD] Added function that returns not only the most interval but all candidates for lower bounds of intervals.
Will be needed for implementation of http://dx.doi.org/10.2312/PE.EuroVisShort.EuroVisShort2013.091-095 and http://dx.doi.org/10.2312/eurovisshort.20141164

... now also legacy OWP files work again

[ADD #422] functionality to store and load the scaling of the network in the network editor to/from project files

.. more work on the manipulator plannes