Added support for setting speed brakes to MATLAB client.

- Updated .jar version of the Java client used by the MATLAB client
 - Added documentation for speed brake setting
 - No additional changes are needed since the Java client handles the heavy lifting.
 - Fixed a bug in sendDREF related to the updated .jar

MATLAB/+XPlaneConnect/sendDREF.m

@@ -35,4 +35,4 @@ end
 value = single(value);
 
 %%Send command
-socket.setDREF(dref, value);
+socket.sendDREF(dref, value);