[FEATURE] Replaced -42 colPos with constant
Merge pull request #125 from hmspl/42

[FEATURE] Replaced -42 colPos with constant
[BUGFIX] Fallback to column name if no label is given for a column
Merge pull request #127 from fudriot/fix-column-name

[BUGFIX] Fallback to column name if no label is given for a column