Updated README

README

@@ -1,7 +1,9 @@
-RNNoise is a noise suppression library based on a recurrent neural network
+RNNoise is a noise suppression library based on a recurrent neural network.
+RNNoise-nu is a modified version of RNNoise aimed to be a bit more general
+purpose.
 
 To compile, just type:
-% ./autogen.sh
+% autoreconf -i
 % ./configure
 % make
 
@@ -12,6 +14,9 @@ While it is meant to be used as a library, a simple command-line tool is
 provided as an example. It operates on RAW 16-bit (machine endian) mono
 PCM files sampled at 48 kHz. It can be used as:
 
-./examples/rnnoise_demo input.pcm output.pcm
+./examples/rnnoise_demo <number of channels> <maximum attenuation> [model to use] < input.raw > output.raw
 
 The output is also a 16-bit raw PCM file.
+
+For information on the neural network models available, see
+https://github.com/GregorR/rnnoise-models