Replaced .h C headers with c-prefixed version and added std:: prefix to C standard library usage (#90)

This was not done to stdint.h for brevity in type names. Also removed "using namespace std;".

wpilibc/athena/src/MotorSafetyHelper.cpp

@@ -7,14 +7,13 @@
 
 #include "MotorSafetyHelper.h"
 
+#include <sstream>
+
 #include "DriverStation.h"
 #include "MotorSafety.h"
 #include "Timer.h"
 #include "WPIErrors.h"
 
-#include <stdio.h>
-#include <sstream>
-
 std::set<MotorSafetyHelper*> MotorSafetyHelper::m_helperList;
 priority_recursive_mutex MotorSafetyHelper::m_listMutex;