Add legend for calendar colors

[cstriffler]

Add the ability to include a "legend" to indicate which color is which calendar. Similar to attached image:

[Zwirbel1]

I second this, a legend would be nice for the colours.

Not related to this improvement: @ cstriffler: how did you manage to colour the event text?

[cstriffler]

I second this, a legend would be nice for the colours.

Not related to this improvement: @ cstriffler: how did you manage to colour the event text?

This is an example from another calendar just to illustrate the idea

[FamousWolf]

This has been added to the dev branch and will be included in the 1.7.0 release.

[FamousWolf]

You can enable the legend by adding showLegend: true to your configuration.

[FamousWolf]

There's a bug in the legend styling and the day columns. I've created a issue (#128) for it, will fix it soon and release a new version.

[Zwirbel1]

Thank you very much for this improvement.