Add a README.md

Author: RussellLVP

src/.gitignore

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 .vs/
 Debug/
 Release/
+*.opensdf
 *.sdf

src/README.md

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+# echo-plugin
+This plugin provides two natives to the Pawn runtime intended to broadcast messages over UDP to a specified destination.
+
+## native EchoMessage(message[]);
+Distributes `message` to the previously set destination. The maximum length of `message` is defined by the Pawn runtime.
+
+## native SetEchoDestination(hostname[], port);
+Sets `hostname`:`port` to be the destination of the UDP broadcast messages. `hostname` will be resolved before being set.