Plugin: gradient previewer

[Golmote]

Previewer for gradients. It should support all gradients syntaxes but the old webkit one (-webkit-gradient()). Old syntaxes are converted to the W3C-valid one.

The plugin will work only in browsers supporting the W3C syntax, unprefixed.

[nauzilus]

Should this also work alongside with previewer-colour? It seems which ever comes first out of gradient and colour will take precedence:

• Colour before gradient
• Gradient before colour

It might just be one of those edge cases like strings inside comments that can't really be helped, just thought I'd bring it up :)

[Golmote]

Thanks for reporting this behaviour. I think gradient should always take precedence if included (no matter the order). I'll see if I can fix this.

[Golmote]

@nauzilus The issue should be fixed. Now the gradient previewer should take precedence over the color previewer if both are included, even if the color previewer is included first.