#65: *v_startup* divided into *v_startup_LP* and *v_startup_MIP* variants to avoid undesired behavior when using integer online variables.

Replacing *IntervalStepCounter* with *tt_aggregate* due to the poor performance of *intervalStepCounter*.

*intervalStepCounter* now uses (counter, t) instead of (counter, counter_) due to the counter set being too limited in size.

Commenting out a couple *v_startup* and *v_shutdown* limits due to them being extremely slow, and not strictly necessary.

The removed limits only aim to ensure that no startup and shutdown is performed if the unit online variable horizon doesn't extend far enough to cover the consequences. This is already ill-adviced, but should'nt have a significant impact on the model anyhow.

Rewriting large portions of *3c_inputsLoop.gms* to make it more compact, and hopefully increasíng performance as well.

Also a minor speedup for setting model dimension (set `msft` etc.)

Changed behaviour of `mSetting` 't_perfectForesight' so that it’s defined from zero (not after 't_jump')

The setting does not have any effect if 't_perfectForesight' is less than 't_jump'.

Allow perfect foresight beyond realization horizon

See merge request !5

New model setting `t_perfectForesight` gives number of time steps after `t_jump` where realization foreast is used

# Conflicts:
#	inc/3b_periodicLoop.gms

Standard deviations of scenario data now needs to be given as input.

Uses new set `fts(f, t, s)` which is the same as `sft` but different order of domains.

Parameter `df_scenario` should be used only for stochastic data (nodes). Also using maximum downward slack and minimum upward slacks in time series aggregation as this was not implemented.

Also added some default values to scheduleInit_temp.gms

Also removed unnecessary set `s_stochastic`.

Fixing the first part of issue #72. If ramping capability is too small compared to the min. load of the unit and the current interval length, the unit is allowed to ramp from zero to min. load in the start-up and from min. load to zero in the shutdown.