/ Increased Font size of trajectory dates
/ Rafos dates are now rounded
/ Marker of trajectory points have an increased size
/ Every 10th point on the trajectory now has a date

/ Changed background color of axes to white
/ Changed colormap to gray skipping the first 44 steps of 300

+ Added checkbox to enable mercator projection
+ Added checkbox to show/hide position dates
+ Extended position dates by rafos day
+ Added colors for trajectories
/ Improved soundvelocity caluclation
+ Added clock error calculation