Fixed svm class weight parameter parsing.
Renamed svm 'weight' parameter to 'class_weights'.

The 'weight' parameter conflicts with the  '__call__' method.
Fixed 'split_escaped_str'.
Merged 'File' and 'CSV File Import' widget.
Fixed filter separator.
Actually pass the 'DK' 'DC' parameters to the load function.
Cleanup unused code.
Replaced header format GUI check boxes with a single combo box.
Added bio tutorial for widgets on the main documentation page.
Added simplified ".txt" header parsing to 'load_csv' function.
Added 'Orange simplified header' parsing to File widget.
Added variable type icons to preview header.
Fixed 'logreg-run.py' example script.
Fixed 'logreg-singlularities.py' example script.
Added (linux) output for logreg-singularities.py script.
Excluded logreg-singularities.py script from regression tests.
Changed `... == None` to `... is None`.

Fix the FutureWarnings from numpy w.r.t None comparison.
Exclude freeviz-classify.py and modules_som1.py from regression testing.
Smaller size hint for single character line edit widget.
Added a 'Reset' button to import dialog.