Files @ r687:6c408d864fa1

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kpeter (Peter Kovacs)
Support negative costs and bounds in NetworkSimplex (#270) * The interface is reworked to support negative costs and bounds. - ProblemType and problemType() are renamed to SupplyType and supplyType(), see also #234. - ProblemType type is introduced similarly to the LP interface. - 'bool run()' is replaced by 'ProblemType run()' to handle unbounded problem instances, as well. - Add INF public member constant similarly to the LP interface. * Remove capacityMap() and boundMaps(), see also #266. * Update the problem definition in the MCF module. * Remove the usage of Circulation (and adaptors) for checking feasibility. Check feasibility by examining the artifical arcs instead (after solving the problem). * Additional check for unbounded negative cycles found during the algorithm (it is possible now, since negative costs are allowed). * Fix in the constructor (the value types needn't be integer any more), see also #254. * Improve and extend the doc. * Rework the test file and add test cases for negative costs and bounds.
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