Integrated media in results + Deezer Engine

New "embedded" item for the results, allow to give an iframe to display the media directly in the results.
Note that the attributes src of the iframes are not set, but instead data-src is set, allowing to only load the iframe when clicked.

Deezer engine based on public API (no key).

searx/engines/soundcloud.py

@@ -6,10 +6,11 @@
 # @using-api   yes
 # @results     JSON
 # @stable      yes
-# @parse       url, title, content
+# @parse       url, title, content, publishedDate, embedded
 
 from json import loads
-from urllib import urlencode
+from urllib import urlencode, quote_plus
+from dateutil import parser
 
 # engine dependent config
 categories = ['music']
@@ -27,6 +28,10 @@ search_url = url + 'search?{query}'\
                          '&linked_partitioning=1'\
                          '&client_id={client_id}'   # noqa
 
+embedded_url = '<iframe width="100%" height="166" ' +\
+    'scrolling="no" frameborder="no" ' +\
+    'data-src="https://w.soundcloud.com/player/?url={uri}"></iframe>'
+
 
 # do search-request
 def request(query, params):
@@ -50,10 +55,15 @@ def response(resp):
         if result['kind'] in ('track', 'playlist'):
             title = result['title']
             content = result['description']
+            publishedDate = parser.parse(result['last_modified'])
+            uri = quote_plus(result['uri'])
+            embedded = embedded_url.format(uri=uri)
 
             # append result
             results.append({'url': result['permalink_url'],
                             'title': title,
+                            'publishedDate': publishedDate,
+                            'embedded': embedded,
                             'content': content})
 
     # return results