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/shared/include/Commands/PrintCommand.h

@@ -5,8 +5,7 @@
 /* the project.                                                               */
 /*----------------------------------------------------------------------------*/
 
-#ifndef __PRINT_COMMAND_H__
-#define __PRINT_COMMAND_H__
+#pragma once
 
 #include <string>
 #include "Commands/Command.h"
@@ -26,5 +25,3 @@ class PrintCommand : public Command {
  private:
   std::string m_message;
 };
-
-#endif