Moon phase widget slow?

@blogmywiki: I can confirm the difference of the rendered phases with the visual moon.

Nevertheless I can confirm the the calculation itself seems correct as also @Andreas_Rozek tested.

From my point of view:

1. It's hard to render a -always correct- circle view projection within 23 px
   
2. Typically a moon projection shows als the full circle; but see 1. with a doted 1px line ... I don't expect to be more precise for our eyes
   
3. I guess using the same code (moonphase calculation) in more than one app/widget or the cool overlays that @Andreas_Rozek provides (e.g. a module) would be very helpfull