[telecinco] Add extractor (closes #4005)

It uses the same extraction process as mitele.es, but with a few small differences.

youtube_dl/extractor/telecinco.py

@@ -0,0 +1,18 @@
+from __future__ import unicode_literals
+
+from .mitele import MiTeleIE
+
+
+class TelecincoIE(MiTeleIE):
+    IE_NAME = 'telecinco.es'
+    _VALID_URL = r'https?://www\.telecinco\.es/[^/]+/[^/]+/[^/]+/(?P<episode>.*?)\.html'
+
+    _TEST = {
+        'url': 'http://www.telecinco.es/robinfood/temporada-01/t01xp14/Bacalao-cocochas-pil-pil_0_1876350223.html',
+        'info_dict': {
+            'id': 'MDSVID20141015_0058',
+            'ext': 'mp4',
+            'title': 'Con Martín Berasategui, hacer un bacalao al ...',
+            'duration': 662,
+        },
+    }