Splitting plots module into plotting subpackage

As title indicates, splits the huge plots.py file into the plotting subpackage with the following structure:

plotting/
            __init__.py - 1012 lines
            dataplots.py - 828 lines
            pandas.py - 187 lines
            sheetplots.py - 284 lines

Any suggestions for renaming the files or even the subpackage are welcome.