VIS: removed debug log output
VIS: added dynamic scrollpane to statsgroups

- All statsgroups have a JScrollPane in which its stats are being shown
- ScrollPane scales dynamically with amount of values, up to a maximum
height threshold of 100 (hardcoded, can be changed in StatsGroup.java)
- Default-Config & displayConfig adjusted accordingly to adapt to the
now a bit wider statsgroups
VIS: fixed a size-issue with statsgrp scrollpanes

Issue occured when only one value was being added to the statsgroup,
causing in an unintended height, which showed the vertical scrollbar.
VIS: removed debug messages from last commit
VIS: added lock checkboxes to GUI

- Each visualizer has a chekbox in his legend, allowing to separately
lock the visualizer, preventing any alteration on the values in the
legend due to resets (pressing the Stop-Button) and / or directory
changes.
- A mainlnock was added to the main display, which can be used to
select/deselect the checkboxes of all visualizers.
VIS: fixed a bug with timeslider with zip batches

Bug was caused when timeslider was moved or the timeslider-buttons where
being used. In that case zipped batches was not being considered and the
normal read operation was executed, resulting in a file not found
exception.