rc file!

So you can have a file at `~/.kaplotdefaults.rc` now. When you import `kaplot.defaults` from system, anything in there will be transparently added in. e.g.:

    **.kaplotdefaults.rc**
    settingname = {...}

then in your script, you can do

    >>> from kaplot.defaults import settingname
    >>> settingname
    {...}