Update readme.txt to point to new ext_libs location and include more test.exe options

readme.txt

@@ -6,12 +6,12 @@ line decoder called "test.exe", and a Winamp plugin called "in_vgmstream".
 
 *********** IMPORTANT!! ***********
 --- needed files (for Windows)  ---
-Since Ogg Vorbis, MPEG audio, and G.722.1 are now supported, you will need to
-have libvorbis.dll, libmpg123-0.dll, and libg7221_decode.dll.
-You can get these from http://hcs64.com/files/vgmstream_external_dlls.zip
+Since Ogg Vorbis, MPEG audio,and other formats are now supported, you will
+need to have certain DLL files.
+You can get these from https://gitlab.kode54.net/kode54/vgmstream/tree/master/ext_libs
 
-Put libvorbis.dll, libmpg123-0.dll, libg7221_decode.dll, and at3plusdecoder.dll somewhere Windows
-can find them.
+Put libvorbis.dll, libmpg123-0.dll, libg7221_decode.dll, libg719_decode.dll,
+and at3plusdecoder.dll somewhere Windows can find them.
 For in_vgmstream this means in the directory with winamp.exe, or in a
 system directory. For test.exe this means in the same directory as test.exe,
 or in a system directory.
@@ -31,9 +31,12 @@ Options:
     -m: print metadata only, don't decode
     -x: decode and print adxencd command line to encode as ADX
     -g: decode and print oggenc command line to encode as OGG
+    -b: decode and print batch variable commands
+    -L: append a smpl chunk and create a looping wav
     -e: force end-to-end looping
     -E: force end-to-end looping even if file has real loop points
     -r outfile2.wav: output a second time after resetting
+    -2 N: only output the Nth (first is 0) set of stereo channels
 
 Typical usage would be:
 test -o happy.wav happy.adx