MMM-page-indicator now easier to style

[KristjanESPERANTO]

MMM-page-indicator has been updated. The main change is that there are new classes that make it easier to customize the styling of the indicators and a new styling section in the README that describes some styling examples. Like this:

or this:

So if you use MMM-page-indicator, check it out 😀

The styling was also possible before, but was a little more complicated and the examples certainly help to develop your own cool styles.

Thanks to @mumblebaj for getting this rolling!