Add Voice binaries (discord-net#1944)

* Add binaries and read me

* Update sending voice docs

* Undo markdown formatting

docs/guides/voice/sending-voice.md

@@ -18,7 +18,7 @@ when developing on .NET Core, this is where you execute `dotnet run`
 from; typically the same directory as your csproj).
 
 For Windows Users, precompiled binaries are available for your
-convienence [here](https://discord.foxbot.me/binaries/).
+convienence [here](https://github.com/discord-net/Discord.Net/tree/dev/voice-natives).
 
 For Linux Users, you will need to compile [Sodium] and [Opus] from
 source, or install them from your package manager.

voice-natives/README.md

@@ -0,0 +1,12 @@
+# Voice binaries
+
+These binaries were taken from the [DSharpPlus](https://dsharpplus.github.io/natives/index.html) website and are temporary until we resolve the old url for them.
+
+**NOTE**: You need to rename libopus.dll to opus.dll before use, otherwise audio client will complain about missing libraries.
+
+#### Licenses
+
+|  Library  | License                                                   |
+| :-------: | :-------------------------------------------------------- |
+|   Opus    | https://opus-codec.org/license/                           |
+| libsodium | https://github.com/jedisct1/libsodium/blob/master/LICENSE |