Add rainbow font

[haavarop]

• Add rainbow css styling with class-name rainbow
• Add test file in same directory
• Rainbow font is of the Arial font-family
• The text has a shadow that is not quite the same as the original, but it is added for respect.

[afriestad]

Pixel positioning will only fit properly on h2.rainbow, won't it? What if the class is set on a h1, h5 or p? Do we want to support arbitrary text size?

[haavarop]

Surprisingly no! I have tested it with the different headers and paragraph tags and they seem to work. Since both the text and the "shadow" are in the same container the absolute -tag positions them properly to each other. As long as they both have the same tag that is.

[afriestad]

The left seems to not work correctly on small font sizes, e.g. for a p it looks like this:

Perhaps we could set it to a fraction of the font size, instead?

[haavarop]

Dang it. Then we need to do that.
I am not happy with the shadows in their current state. I kinda want to remove them outright

[afriestad]

That would not be true to the original form, but it might be acceptable to do so now and add shadows later.