This PR does a few things to make WEC-Sim output compatible with a variable step solver:

• Update all To_Workspace library blocks to use a sample time of simu.dtOut. The previous decimation of round(simu.dtOut,simu.dt,0) is removed.
• Assign the clock time to clock_out in the global reference frame. This overwrites simu.time after the simulation so that the true simulation time-stepping is saved
• Move all wave elevation and wave gauge calculations to the waves.calculateElevation() method (except for user defined wave elevation). This is done so that the true simulation time can be used to calculate the elevation, instead of the assumed fixed-step time series. Some cleanup and refactoring is done to make these calculations easier to read

Other minor clean up:

• remove clear; clc; close all from bemio scripts so that they don't unnecessarily erase other workspace data and plots.

This resolves issue #656