Rename utv.py to unistra.py and extract more info

There are other sites that could be named utv, which would conflict if they are added

youtube_dl/extractor/unistra.py

@@ -0,0 +1,32 @@
+import re
+
+from .common import InfoExtractor
+
+class UnistraIE(InfoExtractor):
+    _VALID_URL = r'http://utv.unistra.fr/(?:index|video).php\?id_video\=(\d+)'
+
+    _TEST = {
+        u'url': u'http://utv.unistra.fr/video.php?id_video=154',
+        u'file': u'154.mp4',
+        u'md5': u'736f605cfdc96724d55bb543ab3ced24',
+        u'info_dict': {
+            u'title': u'M!ss Yella',
+            u'description': u'md5:75e8439a3e2981cd5d4b6db232e8fdfc',
+        },
+    }
+
+    def _real_extract(self, url):
+        id = re.match(self._VALID_URL, url).group(1)
+        webpage = self._download_webpage(url, id)
+        file = re.search(r'file: "(.*?)",', webpage).group(1)
+        title = self._html_search_regex(r'<title>UTV - (.*?)</', webpage, u'title')
+
+        video_url = 'http://vod-flash.u-strasbg.fr:8080/' + file
+
+        return {'id': id,
+                'title': title,
+                'ext': 'mp4',
+                'url': video_url,
+                'description': self._html_search_regex(r'<meta name="Description" content="(.*?)"', webpage, u'description', flags=re.DOTALL),
+                'thumbnail': self._search_regex(r'image: "(.*?)"', webpage, u'thumbnail'),
+                }