fixed a bug with departure times that didn't end in a multiple of 15 mins

individual optimization didn't work with Remco's EV data, since there was a check that required departure times to be equal to one of the load time series times, which are only in multiples of 15 mins. Since the departure times in Remco's data were at random minutes this failed and the individual optimization never ran.

Also changed some bugs in Remco's input data that came from converting the file to csv and reduced the standard deviations to 0, since this data already has a natural variation.