Twitter OG Tags customisable from admin panel

[hvitis]

Currently there is just a HTML template prepared for showing them:

    <!-- //TODO: Implement Twitter og tags into settings -->
    <!-- <meta name="twitter:card" content="TWITTER_IMAGE_URL">
    <meta name="twitter:site" content="@TWITTER_SITE">
    <meta name="twitter:title" content="TWITTER_TITLE">
    <meta name="twitter:description" content="{% for el in page_description %}{% if el.name == 'description' %}{{el.description}}{% endif %}{% endfor %}">
    <meta name="twitter:creator" content="@TWITTER_USERNAME">
    <meta name="twitter:image" content="TWITTER_IMAGE_URL"> -->

Context processor should be added for this