Fixed problem with barometer at 50 Hz + Fixed overlapping of timestamps in sensor update

Temperature was not initialized correctly, therefore the simulation could run only at certain frequencies (e.g. 10 Hz). Now can run at 50 Hz as well as 100, or every frequency that gives a dt multiple of 0.01. Plus, the timestamps of sensorTot were not updated correctly, as an overlapping of the first timestamp of the new measure and the last timestamp of the previous measure occurred. Now this is fixed too.