The web/waving-flag -sample needs some visual improvements

[DiscoNova]

When artist or title is long, the sample doesn't handle multiline text properly. When the layers are originally created, it should be rather simple to calculate a dynamic basefont size for both fields' containers so there'd be no need to support multiline text. The main effect most likely wouldn't suffer from this.

Also, at the moment the effect is implemented using 26 copies of the actual text like in Yusuko Nakaya's original proof of concept. This number of "layers" should be quite easy to reduce while still retaining the basic look and feel of the effect. Need to keep in mind that reducing the layers also means recreating part of the CSS, since the samples currently don't use any kind of preprocessor in order to be more easily approachable.