Opentepes

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- [FIXED] fix error in output results with multiple
- [CHANGED] add column ProductionFunctionHeat in Data_Generation file to consider heat production of generators
- [CHANGED] add column HTNSCost in Data_Parameter file to consider heat not served cost
- [CHANGED] add column IndBinNetHeatInvest in Data_Option file to consider binary or not heat network investment decisions

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- [FIXED] fix error when some scenarios have prob 0

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- [CHANGED] move the computation of storage total energy inflows to reduce computation time
- [CHANGED] avoid the use of last in computing duals

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- [FIXED] allow solving just one period out of several defined
- [CHANGED] split variable definition and bound assignment
- [CHANGED] simplify the dual variables computation

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- [CHANGED] avoid some future warnings in output results

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- [CHANGED] introduce the variable emission cost file