New addon: pvr.iptvsimple

Hi Lars, this PR add PVR IPTV Simple addon for XBMC in official pvr addons tree.
Currently it support a channel list in m3u format with groups, icons and EPG in xmltv format.

I tested this addon on win32, linux(32 and 64), osx (32 and 64 bits), raspbmc, openelec and ios/atv. I think it shold work correctly on android also, but I can't test this.