Event color indicator 'leaking' default color

[cyrilzakka]

If you look closely at the event indicators after modifying the color for them (i.e. calendar.appearence.eventColor = .whiteColor()), you'll see that the default blue color still appears behind it which looks quite offsetting.

A quick fix for it would be modifying the alpha in #define FSCalendarStandardEventDotColor FSColorRGBA(31,119,219,0) to 0 as shown.

[WenchaoD]

Hi @Archivus Thanks for your advice. This commit has fix the issue. It turns out that the layer shouldn't contains a backgroundColor along with the contents.