Refactors X and Y to Data & Column in XYAxis #462
Removes the generic X and Y reference, and renames the axis to data and column axis. All the instances of axis are renamed to dataAxis and columnAxis, but the variables x and y are left as it is, as they are heavily used in calculations in the Line and Column files. Signed-off-by: Anmol Jagetia <email@example.com>
@mlzummo These charts can now swap orientation (think bar / column) the styles are directed at the "data values" and "columns" rather than the x / y axis, which is why we are renaming some of the variable / class names (Note: there are still some true x / y variables which should remane).