Refactor rendering licenses property

[anuveyatsu]

Currently:

{% if dataset.licenses %}
<i class="fa fa-gavel"></i> <a href="{{dataset.licenses[0].url}}" title="Available under the following License">{{dataset.licenses[0].name or dataset.licenses[0].id}}</a>
{% elif dataset.license %}
<i class="fa fa-gavel"></i> {{ dataset.license }}
{% endif %}

instead, we have to expect licenses to be an array of objects only as per specs - https://specs.frictionlessdata.io/data-package/#licenses

Also, use name, title and path properties appropriately so it is useful:

• use name for display
• use title for hover info
• use path to linkify

Acceptance criteria

• [x] properties are used as above ^

Tasks

• [x] refactor showcase.html template as per description of this issue

EXTRA

• [x] refactor listify snippet, which is used for rendering sources property, to don't be a link if path property is not provided. Otherwise, it is linked to the showcase page itself, see http://datahub.io/core/finance-vix

[anuveyatsu]

FIXED