Delete &OR Combine: World of Planes, War Thunder: World of Planes

Earlier* this year Gaijin Entertainment's MMO project World of Planes was renamed to War Thunder.

Currently two pages related to this game exist:

1. World of Planes
2. War Thunder: World of Planes

Either one of them should be renamed to plain just "War Thunder" and the other one deleted. Perhaps an alias "World of Planes" is useful for those remembering its initial name.

ref:

• * 'Gaijin Enterainment 'News' announcement: http://gaijin.ru/en/news/54/current/
• Official website: http://warthunder.com/

NB: This is not World of Warplanes by Wargaming.net

@d0rks: Done.