Added attributes to linkPretty.

[Daniel-KM]

I added the possibility to add attributes to linkPretty(), like in link() and linkRaw().

I was wondering too if the default class resource-link should be added in all cases or not.

[zerocrates]

Yeah, I think if we're going to allow custom attributes here, we want to force resource-link into the class at all times, since it's the backbone of the styling.

[Daniel-KM]

Ok, I add it.

[zerocrates]

Looks good to me; should allow this to be used in a couple situations it otherwise wouldn't work for.