Add more og carg support

theme/templates/album.html

@@ -1,5 +1,12 @@
 {% extends "base.html" %}
 
+{% block extra_head %}
+<meta property="og:image" content="{{ settings.base_url }}{{ album.thumbnail }}">
+<meta property="og:url" content="{{ settings.base_url }}{{ album.path|urlencode }}">
+<meta property="og:description" content="{{ album.medias|length }} photos in this album.">
+<meta name="twitter:card" content="summary_large_image">
+{% endblock %}
+
 {% block content %}
 <ul>
   {% for media in album.medias %}

theme/templates/album_list.html

@@ -1,5 +1,12 @@
 {% extends "base.html" %}
 
+{% block extra_head %}
+<meta property="og:image" content="{{ settings.base_url }}{{ album.thumbnail }}">
+<meta property="og:url" content="{{ settings.base_url }}">
+<meta property="og:description" content="{{ album.albums|length }} albums in this gallery.">
+<meta name="twitter:card" content="summary_large_image">
+{% endblock %}
+
 
 {% block content %}
 <ul>

theme/templates/media.html

@@ -3,8 +3,10 @@
 {% block extra_head %}
 <link rel="stylesheet" href="{{ theme.url }}/css/media.css">
 <link rel="stylesheet" href="{{ theme.url }}/fork-awesome/css/fork-awesome.min.css">
+
 <meta property="og:image" content="{{ settings.base_url }}{{ media.path|urlencode }}/{{ media.url }}">
 <meta property="og:url" content="{{ settings.base_url }}{{ media.path|urlencode }}/{{ media.url }}.html">
+<meta property="og:description" content="Photo {{ media_index }} of {{ album.medias|length }}">
 <meta name="twitter:card" content="summary_large_image">
 {% endblock %}