Add Opencast logo (#145)

* Add Opencast Logo

This patch adds the logo of Opencast

* Make Opencast logo even smaller

* Adhere to contributor guidelines

* Added white background

* Fixed icon size

* Add newlines to SVG file

* Combine paths

radius.html

@@ -82,7 +82,8 @@
 			'intel',      'badoo',       'laravel',    'twilio',     'google_play',  'gmail',
 			'plex',       'slack',       'xing',       'pinboard',   'internet_archive', 'samsunginternet',
 			'baidu',      'twitch',      'ok',         'pocket',     'stumbleupon',  'viber',
-			'workato',    'sketch',      'vlc',        'google_maps','access',       'ethereum'
+			'workato',    'sketch',      'vlc',        'google_maps','access',       'ethereum',
+			'opencast'
 		 ];
 
 		var container = document.querySelector('.icons');