[cosmetic] update copyright headers

Hopefully almost all the copyright headers updated

**Copyright (C) Year-Year Team XBMC** or **Copyright (C) Year Team XBMC**

are normalised to **Copyright (C) 2005-2014 Team Kodi**

and **http://xbmc.org**

is now **http://kodi.tv**

A couple of other documents have minor cosmetics for XBMC -> Kodi but they are just cosmetic.

@MartijnKaijser or @topfs2 for review.