Implemented new data management for data plots for ticket #615
Added new data management to plotting for ticket #615
Created branch for ticket #615
Added the ticket #607 to the changes log.
Added the commands to load the new language file numere.nlnp that contains parts of the previous main.nlnp language file. The new language file structure that made this change necessary, is described in ticket #607.
Added the change log entry for the "clc" command as described in #624.
Added the clc command that allows to clear the terminal and resets it to the startup state according to ticket #624.
Implemented ticket #605 "Use Savitzky-Golay for taylor"
Implemented ticket #632 "Resolve the 'GraphViewer-Zoom-Bug'" Additionally, resolved a timezone issue introduced with #628
Implemented ticket #643 "Add buffer to 2D smoothing"