Clean up include guards and EOF newlines (#65)

* Replaced include guards with #pragma once

* All source files now have exactly one newline appended

Some files had either two newlines at the end or none (which isn't POSIX compliant). This patch fixes that.

wpilibc/sim/include/simulation/SimContinuousOutput.h

@@ -5,8 +5,7 @@
 /* the project.                                                               */
 /*----------------------------------------------------------------------------*/
 
-#ifndef _SIM_SPEED_CONTROLLER_H
-#define _SIM_SPEED_CONTROLLER_H
+#pragma once
 
 #ifdef _WIN32
 // Ensure that Winsock2.h is included before Windows.h, which can get
@@ -42,5 +41,3 @@ class SimContinuousOutput {
    */
   float Get();
 };
-
-#endif