Allow to specify target attribute in links

[byroot]

Ref: #29
So the link feature is awesome:

One little downside: I wish I could specify target="_blank" because output pages are quite big and take a while to load, so it's a bummer when you forget to open the link in a new tab and that you have to load the output page again after.

@toolmantim @keithpitt @mipearson what do you think?

I tried to implement it myself, but my go is really not good :/

[keithpitt]

We could probably make it an boolean in the sequence? I think it's a valid case to be able to open it in a new tab.

[keithpitt]

Also, how do you do the linking? Is it something you'd be able to open source? :D:D

[byroot]

Also, how do you do the linking? Is it something you'd be able to open source? :D:D

In part maybe. But it's quite dirty / coupled to our application ATM.

[keithpitt]

What do you think of this @mipearson?

[ticky]

The only thing I’d suggest is we be wary of the fact that this has potential security considerations (especially considering this is linking to user-specified content), albeit ones Google don’t seem too concerned about

[mipearson]

I think a solution for this is that we add target="_blank" to the links rather than a custom thing