[ChangeLog] Actualize

[ci skip]

ChangeLog

@@ -1,3 +1,25 @@
+version <unreleased>
+
+Core
+* [extractor/common] Improve thumbnail extraction for HTML5 entries
+* Generalize XML manifest processing code and improve XSPF parsing
++ [extractor/common] Add _download_xml_handle
++ [extractor/common] Add support for relative URIs in _parse_xspf (#15794)
+
+Extractors
++ [7plus] Extract series metadata (#15862, #15906)
+* [9now] Bypass geo restriction (#15920)
+* [cbs] Skip unavailable assets (#13490, #13506, #15776)
++ [canalc2] Add support for HTML5 videos (#15916, #15919)
++ [ceskatelevize] Add support for iframe embeds (#15918)
++ [prosiebensat1] Add support for galileo.tv (#15894)
++ [generic] Add support for xfileshare embeds (#15879)
+* [bilibili] Switch to v2 playurl API
+* [bilibili] Fix and improve extraction (#15048, #15430, #15622, #15863)
+* [heise] Improve extraction (#15496, #15784, #15026)
+* [instagram] Fix user videos extraction (#15858)
+
+
 version 2018.03.14
 
 Extractors