Adding ramping costs. Upward and downward ramps separated into different tiers (or 'slacks') with different costs.

Updates to run-up phase. Added unit conversions from p.u./min to p.u./h and multiplication by intervalInHours for p_u_maxOutputInLastRunUpInterval and p_ut_runUp. Tested only with deterministic run, intervalInHours=1 and intervalLength=1. Calculation of dt_toStartup probably needs a fix for other intervaLengths than 1.

Model definition files included in the VCS now only include the GAMS definition (list of included equations), all of which are read by Backbone to allow for easier swapping of models without having to tamper with the "3e_solve.gms" fole. Rest of model parameters are expected to be given as input through the renamed "modelsInit.gms" in the input folder (by default). "periodicLoop.gms" and "periodicInit.gms" now treated as integral parts of the Backbone model.

Example input parameters provided by the "scheduleInit_temp.gms", "buildingInit_temp.gms" and "investInit_temp.gms" included in the defModels folder within the VCS.

Added separate "param_gn" governing absolute and slack bounds, as well as a new "pgnData" that defines desired penalty terms for (grid, node) slack variables. Includes a few changes to sets as well.

Min and MaxStorage content equations were corrected and separate maxHydroPower equation disposed of. Also clarifications to the equation descriptions and storage model equation update.

The model was taking all time periods starting from first t - now it starts from the beginning of the solve period.

Cleaning up Backbone.gms code

New structure for setting time period lengths, which allows different time period lengths depending on the horizon. Some cleaning up of set/parameter/variable names.