(caf7e6a2e) Replaced Concentus NuGet package with csproj (ensures correct System.Runtime references)

Libraries/Concentus/CSharp/Concentus/Readme.txt

@@ -0,0 +1,52 @@
+Hi there, welcome to the Concentus package. You're about to ask me for sample code, so I'll get straight to it:
+
+If you're already using something like P/Opus then your code probably looks like this:
+
+	[DllImport(OPUS_TARGET_DLL, CallingConvention = CallingConvention.Cdecl)]
+	private static extern IntPtr opus_encoder_create(int Fs, int channels, int application, out IntPtr error);
+
+	[DllImport(OPUS_TARGET_DLL, CallingConvention = CallingConvention.Cdecl)]
+	private static extern int opus_encode(IntPtr st, byte[] pcm, int frame_size, IntPtr data, int max_data_bytes);
+
+	// Initialize
+	IntPtr error;
+	IntPtr _encoder = opus_encoder_create(48000, 1, OPUS_APPLICATION_AUDIO, out error);
+	opus_encoder_ctl(_encoder, OPUS_SET_BITRATE_REQUEST, 12000);
+
+	// Encoding loop
+	byte[] inputAudioSamplesInterleaved; // 16-bit pcm data interleaved into a byte array
+	byte[] outputBuffer[1000];
+	int frameSize = 960;
+
+	unsafe
+	{
+		fixed (byte* benc = outputBuffer)
+		{
+			IntPtr encodedPtr = new IntPtr(benc);
+			int thisPacketSizeOrSometimesAnErrorCode = opus_encode(_encoder, inputAudioSamplesInterleaved, frameSize, encodedPtr, outputBuffer.Length);
+		}
+	}
+
+Here is what you can replace it with:
+
+	// Initialize
+	OpusEncoder encoder = OpusEncoder.Create(48000, 1, OpusApplication.OPUS_APPLICATION_AUDIO);
+	encoder.Bitrate = 12000;
+
+	// Encoding loop
+	short[] inputAudioSamples
+	byte[] outputBuffer[1000];
+	int frameSize = 960;
+
+	int thisPacketSize = encoder.Encode(inputAudioSamples, 0, frameSize, outputBuffer, 0, outputBuffer.Length); // this throws OpusException on a failure, rather than returning a negative number
+
+And here is the decoder path:
+
+	OpusDecoder decoder = OpusDecoder.Create(48000, 1);
+
+	// Decoding loop
+	byte[] compressedPacket;
+	int frameSize = 960; // must be same as framesize used in input, you can use OpusPacketInfo.GetNumSamples() to determine this dynamically
+	short[] outputBuffer = new short[frameSize];
+
+	int thisFrameSize = _decoder.Decode(compressedPacket, 0, compressedPacket.Length, outputBuffer, 0, frameSize, false);