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/Buttons/NetworkButton.h

@@ -5,8 +5,7 @@
 /* the project.                                                               */
 /*----------------------------------------------------------------------------*/
 
-#ifndef __NETWORK_BUTTON_H__
-#define __NETWORK_BUTTON_H__
+#pragma once
 
 #include <memory>
 #include <string>
@@ -24,5 +23,3 @@ class NetworkButton : public Button {
   std::shared_ptr<ITable> m_netTable;
   std::string m_field;
 };
-
-#endif