Allow author data as an object

[pathawks]

Try to mirror behavior of jekyll-feed
#18 #23

[benbalter]

1. It looks like you're adding the @? I believe the Twitter spec says it shouldn't have an @, but I haven't looked at it in a while.
2. We can DRY things up a bit by moving the normalization down to the one place it's used.

[pathawks]

It looks like you're adding the @?

It was there before.

The example at the bottom of this page includes the @

[pathawks]

We can DRY things up a bit by moving the normalization down to the one place it's used.

All of our other variables are normalized before they are used, and I wanted to keep with that convention.

I could do something like this:

{% if page.author.twitter %}
  {% assign seo_author_twitter %}
{% else %}
  {% assign seo_author_twitter %}
{% endif %}
{% if seo_author_twitter %}
  {% assign seo_author_twitter = page.author.twitter | replace:"@","" | prepend:"@" %}
{% endif %}

[benbalter]

Nice. Sorry for the delay. Also opened #31 to piggy back on this, so that author's metadata can be centralized, rather than in each post.