added definitions for bufferstream

bufferstream/bufferstream-tests.ts

@@ -0,0 +1,14 @@
+/// <reference path="bufferstream.d.ts" />
+
+import BufferStream = require('bufferstream')
+
+var stream = new BufferStream({encoding:'utf8', size:'flexible'});
+stream.enable();
+stream.disable();
+stream.split('//', ':');
+stream.on('split', (chunk: any, token: any) => {
+	console.log("got '%s' by '%s'", chunk.toString(), token.toString())
+});
+stream.write("buffer:stream//23");
+console.log(stream.toString());
+