Replacing <button> element with <a href> whenever there's a link

[shaal]

Resolving #263.

If there is a link inside the button, it switches it into element, because it only needs to look like a button but behave like a link.
I added twig brackets to print partial elements {{ "<a" }}, because it seemed a "cleaner" way of doing it, but the same result can be achieved without these brackets.

[evanmwillhite]

Since we already have a link component, let's get rid of the <a> and href pieces (and the if/else statements) altogether. href being in here was probably leftover from before we split those up or something and you're right, we don't need it. If we need to attach JS events, we can add data attributes (or whatever we want) easily enough per project.

[shaal]

@evanmwillhite I removed the (and all the if/else statements) from button

[evanmwillhite]

Great, thanks! And thanks for all your work and feedback with the project lately. We appreciate it!