[win32] add make-addons.bat and cmake-based addon buildsystem
[win32] don't copy libogg and libvorbis to system/cdrip
[win32] make sure that _cdecl and _declspec are properly defined when including xbmc_audioenc_types.h
[win32] add TARGET_WINDOWS preprocessor define when building an addon
[win32] update BuildSetup.bat and installer