Added ogg codec

.gitmodules

proj/SkyXEngine/vs2013/SkyXEngine.sln

proj/ddsplugin/vs2013/ddsplugin.vcxproj

proj/ogg-vorbis/vs2013/ogg-vorbis.sln

proj/ogg-vorbis/vs2013/ogg-vorbis.vcxproj

proj/ogg-vorbis/vs2013/ogg-vorbis.vcxproj.filters

proj/oggplugin/vs2013/oggplugin.vcxproj

proj/oggplugin/vs2013/oggplugin.vcxproj.filters

sdks/ogg

sdks/vorbis

source/oggplugin/AudioCodecOgg.cpp

source/oggplugin/AudioCodecOgg.h

source/oggplugin/dllmain.cpp

source/oggplugin/plugin_main.cpp

source/xcommon/IXAudioCodec.h