Clean up includes.

stepmania/src/archutils/Unix/Backtrace.cpp

@@ -3,12 +3,12 @@
 #include "RageUtil.h"
 
 #include <unistd.h>
-#include <stdlib.h>
+#include <cstdlib>
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <sys/ptrace.h>
 #include <sys/stat.h>
-#include <errno.h>
+#include <cerrno>
 #include <fcntl.h>
 
 #if defined(BACKTRACE_METHOD_X86_LINUX)

stepmania/src/archutils/Unix/BacktraceNames.cpp

@@ -3,12 +3,12 @@
 #include "global.h"
 #include "BacktraceNames.h"
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdarg.h>
+#include <cstdio>
+#include <cstdlib>
+#include <cstdarg>
 #include <unistd.h>
-#include <string.h>
-#include <errno.h>
+#include <cstring>
+#include <cerrno>
 
 #include "RageUtil.h"
 

stepmania/src/archutils/Unix/CrashHandler.cpp

@@ -1,14 +1,14 @@
 #include "global.h"
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdarg.h>
+#include <cstdio>
+#include <cstdlib>
+#include <cstdarg>
 #include <unistd.h>
-#include <string.h>
-#include <errno.h>
+#include <cstring>
+#include <cerrno>
 #include <limits.h>
 #include <fcntl.h>
-#include <signal.h>
+#include <csignal>
 
 #include "RageLog.h" /* for RageLog::GetAdditionalLog, etc, only */
 #include "RageThreads.h"

stepmania/src/archutils/Unix/CrashHandler.h

@@ -8,7 +8,7 @@ void CrashHandlerHandleArgs( int argc, char* argv[] );
 void InitializeCrashHandler();
 	
 #if !defined(DARWIN)
-#include <signal.h>
+#include <csignal>
 #include <ucontext.h>
 void CrashSignalHandler( int signal, siginfo_t *si, const ucontext_t *uc );
 #endif

stepmania/src/archutils/Unix/CrashHandlerChild.cpp

@@ -1,9 +1,9 @@
 #define __USE_GNU
 #include "global.h"
 
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
+#include <cstdio>
+#include <cstring>
+#include <cerrno>
 #include <sys/types.h>
 #include <sys/wait.h>
 

stepmania/src/archutils/Unix/SignalHandler.cpp

@@ -4,10 +4,10 @@
 #include "SignalHandler.h"
 #include "GetSysInfo.h"
 
-#include <stdlib.h>
+#include <cstdlib>
 #include <unistd.h>
 #include <sys/mman.h>
-#include <errno.h>
+#include <cerrno>
 
 static vector<SignalHandler::handler> handlers;
 SaveSignals *saved_sigs;

stepmania/src/archutils/Unix/SignalHandler.h

@@ -1,7 +1,7 @@
 #ifndef SIGNAL_HANDLER_H
 #define SIGNAL_HANDLER_H
 
-#include <signal.h>
+#include <csignal>
 #include <ucontext.h>
        
 class SaveSignals